PANTONE
® PANTONE HANDBOOK OF COLOR IN HEXACHROME PROCESS PROCE SSWORKFLOW WORKFLOW cH
Table of Cont Cont ents Introduction 1 PANT ANTON ONE E®H ®Hexac exachrom hrom e® † Proces Process s Work Work flo w 2 Using PANT PANTON ONE E HexW HexWrench®for rench®for High -end Production 3 Using Adobe® Adobe®P Photoshop®5.0 to Soft Soft proof Hexachrome®Separations 4 Using Qu QuarkX arkXP Pres ress s™ 4.0 for Hexachrom Hexachrom e Production 5 Using Using Adobe Page PageMaker® Maker®6.5 6.5 for Hexachrome Hexachrome Production 6 How to use Illustr Illustr ator® ator®and and Free FreeHa Hand® nd®for for Hexachrome He xachrome Producti on 7 Freque requently ntly As Asked ked Ques Questions tions Appendices
All t rademarks (™ (™) and r egistered tr ademarks ademarks (®) used herein are eit her t he prop erty of Pantone, Inc.,Studion Soft Industries, Ltd. or oth er companies.Portions print ed using PANT PANTONEHexachrome ONEHexachrome Color Technology.‡Hexachrome®is echnology.‡Hexachrome®is Pantone,Inc.’s six-color pri ntin g pro cess.U.S cess.U.S.Patent No. 5,734,800 5,734,800.. HexWrench®and SAME™are t rademarks of Studion Soft Industries,Ltd. Studi on is a trade name for Studi Studi on Soft Soft Industries, Ltd. AeQ™is a trademark of Light Source Comput er Images, Inc. AeQ (Appearance Equivalence) qui valence) is licensed from Lig ht Source Comput omp uter er Images,Inc. Adobe®, Photoshop®, PageMaker®and ageMaker®and Illustr ator®are registered t rademarks of Adobe Systems,Inc. Apple, the Apple log o, ColorSync and Mac are registered registered t rademarks of Appl e Comput Comput er,Inc.i n the U.S. and other countries. Any omission of such marks from any product is regretted and is not int ended as an infringement on such t rademarks.Process rademarks.Process color repr oduction may not mat ch PANTO PANTONE NE®identi fied solid color standards.Refer to current PANT PANTON ONEC EColor olor Publications for the accurate color. © Pant Pantone, one, Inc.,1998
1H
WELC WE LCOM OME E TO HEXAC HEXACHROM HROME E This b ook is writt writ t en as a “how t o” guide for Hexa xac chrome pr production. oduction. It wil willl st st art wit with h an an introduct int roduction ion t o the t he He Hexa xac chrom hrome e pr proc oce ess, t hen conce oncent ntra ratt e on differe dif ferent nt app pplilic cat ions for Hexachrome production. At t he end of the t he book book,, you will find fi nd a CD-ROM whi which ch conta cont ain ins s a tes testt fo form rm wi witt h pr preesepa eparated rated ima images ges.. A pr prin intt ed copy of t hi his s is als lso o sup uppl plied ied as an att att achment chment.. If you need need more mor e inf informati ormation on or te t echni hnic cal sup uppo port rt on t he Hexa Hexachrome chrome proces pr ocess s, you can can call Pantone at (888) PANTONE or (201) 935-5500.You can also send an e-mail to: hexachrom hexachr ome@ e@pant anton one. e.com com,, or vis visitit our Web Web sit site: e: www.hexachrome.pantone.com,, where t his www.hexachrome.pantone.com book can be downloaded as a PDF file and other use us eful inf informati ormation on is i s pos postt ed ed..
H2
1 PANTO NTONE NE HEXACHROM HEXACHROME E PR PROCE OCESS SS WORKFLOW The eas easies iestt w ay t o achi achieve eve brill bri lliant iant result result s Pantone’s ongoing corporate objective is to make communicating in color easy and accurate so that people can use use color wit with confidence confidence..To this t his end end,, Pantone, nt one,Inc.cont Inc.continually inually strives t o unders understtand, through hrough extens ext ensive ive res resea earch, rch, the needs and cha changing work environments environment s of individ individua uall users users and organizations.This effort has been rewarded in the widespread adoption of the Hexachrome six-color process printing system.
3H
Every step in the printing process is a compromise in color fidelity and quality qualit y. A camera camera does not capt capture ure the t he entire enti re visual visual spectrum spectrum nor the t he detail det ail seen seen by the t he human eye.A sca scanner nner can only prop roduce a file which is an approximation of the original transparency. Images are further diminished by the constraints of the CMYK color space.Finally,the limitations of four-color process printing, with wit h film and plates p lates, halft halftone one dots and and ink in k on paper,not paper,not to mention impure primary ink colors,strikes the final blow to the integrity of the t he original artw artwork ork.. Hexa He xachrome chrome print pri nting ing has been develop developed ed to dras d rastica ti calllly y improve color reproduction and provide photo-realistic results by using using six inks instead instead of the th e standard standard four fo ur proces p rocess s colors tradition traditi on-ally used in offset printing. The Hexachrom Hexachrome e six-col six-color or pr p rocess ocess sys systtem was w as launched in May 1995 and incorporates every aspect of the design,prepress and printing print ing w work orkflow, flow, including a custom custom ink set, set,color color refere reference nce guides, guides, digita digit al color libra lib raries ries,, softw oftwa are and proofing pr oofing methods.By methods.By using the the Hexachrom Hexachrome e six-color ix-color proces process s sys systtem,the print pri ntable able color gamut is increased by almost 50% and over 90% of the solid PANTONE NTONE MATCHI MATCHING SYSTEM ® Colors can can be simulated through t hrough the th e use use of He Hexa xachrome chrome scree screen n tint t int combinations. combi nations.
Hexachrome Hexac hrome pri nti ng has been developed developed t o drastically improve color reproduction and provide photo-realistic results.
•
• • • H4
Benefit s of Hexachrome Hexachrome for fo r creat creat ive, prepr ess ess and prin pr in t professionals. For creative creati ve profes prof essional ionals s, the th e System ystem offers the ability abili ty to achieve achieve nuances of color that th at had previous p reviously ly been unatta unatt ainable. For thes t hese e users,Hexachrome has the following benefits: It is easy to use. use.De Des signers can can achieve better bet ter color result results s withwit hout having to learn anything new or make any changes to the way they work. Vibrant ib rant colors col ors as as well as past pastels and jewel-t jewel-tones ones reproduce extremely well. It is alrea already dy incorporated incorporated in the design design softw softwa are they use. use. There is no need to t o purchas p urchase any any additional addit ional product p roducts s. It has a larger color gamut than th an an an RGB monit or. Desig Designers ners can reproduce in print the color they see on their monitor. It is a cos cost-effec t-effective tive choice choice when color color is criti critica cal. l. Corporate logo l ogo
colors or packaging packaging can be accurately accurately reproduced reprod uced without wit hout having to pay extra for additional solid color inks which do not benefit the entire printed prin ted piece. piece. • It is widely widely availa vailable ble.. Six-color reproduction is readily available from most most printing print ing companies. companies. For the t he prepress prepressprof profes essional ional,, Hexachrome printing is yet another reason to adopt an RGB or CIELAB workflow.Its benefits can be seen in: in : • Improve Improved d proces processing spee speeds ds.. Because it is necessary to take advantage advantage of an RGB or CIELABwo workflo rkflow, w,pr prepr epres ess s prof profes ess sionals ionals can work with 25% less data throughout much of the workflow. • Advance dvanced ds sca canning nning efficiencie efficiencies s. With the t he ad ad vent vent of the t he Internet, Internet, prepress prepress providers pro viders not only scan scan im images ages for print p rint,, but now also also supply their clients with RGB scans that will be repurposed and used on the Web. Print rint profess professionals ionals benefit from offering the latest,most advanced printing methods to their customers.Hexachrome six-color proces process printing print ing provides pr ovides printers print ers with wit h the t he abilit ability y to: • De Delive liverr high quality quality color color at no additional additional cost. cost. Printers regularly add “bump plates plat es”” of solid colors to CMY CMYK print prin t jobs job s. As Hexa He xachrome chrome eliminates elimin ates this th is need need for f or additional addit ional colors colo rs to accurately rately reproduce reprod uce solid solid colors and and enhance enhance images, the th e price is virtually identical to many jobs they are currently printing for their th eir customers. customers. • Use one printing printi ng proces process for all kinds of jobs. Using only o nly the t he Hexachrome color ink set,printers can obtain high quality color results for a variety of printing processes,including spot color, CMYK process printing and Hexachrome high fidelity color print job j obs s. Usin Using g Hexachrom Hexachrome e shor shortens tens pres press s wash-u wash-up p and saves saves the printer prin ter money on ink supp supplies lies,, allowing allowin g the t he bulk purchase purchase of a single ing le type t ype of ink i nk for all thes th ese e printi prin ting ng process processes. The Hexachrome six-color printing process can be used by anyone who is interested in achieving high quality color,regardless of the computer platform they use to design or produce their
Hexachrome is a ful l y Hexachrome integrated process.
5H
• • • •
work. He Hexa xachrom chrome e is a fully-in ful ly-integ tegrated rated proces process s, encompas encomp ass sing ing a complete support infrastructure that includes: design design and and illus illustration tr ation software oftware color color correc correction tion and sepa epara ration tion capa capabilities bilities analog nalog and and digital digital color color proofin proofing g prin printi ting ng ink inks This book addresses the key issues involved in migrating from a four-color printing model to Hexachrome six-color process printing. Getting ett ing Star Star ted One of the most important issues in migration to a new technology is i s the proces p rocess s wo workflow. rkflow. Pantone antone has add addres ress sed this t his issue issue by working with our technology partners and licensees to add Hexa He xachrome chrome supp support ort directly directl y into int o their t heir products.T pr oducts.This his str strategy ategy has has been extremely succes successful. Today, oday, the th e list of products produ cts that incorpo incor po-rate Hexa Hexachrome chrome is the th e who’ who ’s who of electronic electron ic publi pu blis shing. Color Gamut How often have we prepared an image in Adobe Photoshop,only to find that the vibrant colors could not be accurately reproduced with CMYK color inks.What looked so bright and intense onscreen creen turned t urned out subdued ubdu ed on on-pres -press s. The reason reason for f or this t his is that each each device,w device,whet hether her it ’s a scanner, a monitor or a printer,has a certain limitation on the colors that can be used.The range of available colors is called the gamut.The visible visible spect spectrum,wh rum,what at we are capabl capable e of seeing, seeing, has the widest spectrum of colors or gamut.The range of colors available from scanners and monitors that use RGB colors and printers that use CMYK MYK colors colors can be greatly greatl y reduced. Hexachrome, Hexachrome,on on the t he other other hand,has a gamut that is significantly larger than CMYK color inks for offset offset printing print ing.. Now Now,, color reproduction reproduction capabiliti capabilities es are limited limit ed only by the capabilities of the scanner or monitor. Color ol or Space Full-color printing is traditionally done with four-color process.The CMYK color space is limited to colors which can be defined as 0 to
H6
100%cyan,0 cyan,0 to t o 100% magenta,0 magent a,0 to t o 100%yellow, yello w, and 0 to 100% black.If a color cannot be reproduced using some combination of these four inks,then it does not exist in the CMYK color space. Computer monitors use red,green and blue to reproduce colors.This is the RGB color space.It includes colors which can be defined defined as 0 to 100% red,green red, green and blue b lue and are scaled scaled from 0 to 255.The 255.The RG RGB color color space includes inclu des different different colors colors than than the t he CMYK color space.This is why you can see colors on your monitor which you cannot canno t repro rep rodu duce ce usin using g CMY CMYK K. RGB is larger larger than t han CMYK CMYK,but it still does not include all colors visible to the human eye. The CIELAB (L*a*b*) color space is an international standard which includes all colors visible to the human eye.CIE stands for Commis ommi ssion Internationale Internatio nale de l'E l 'Eclaira clairage ge which w hich developed the t he CIELAB color space in 1976.The L* in CIELAB stands for the color's bright brig htnes ness s or luminance lu minance value, value,a* a* stands stands for the th e color's posit position ion on the red-green axis and b* stands for the color's position on the yellow-blue axis. Color changes on any axis in the CIELAB color space are measured in units of Delta E.A Delta E of one (1) is defined as the smallest color change visible to the human eye.Delta E is used to communica communi cate te changes in color for fo r color correction as well as quality control.This may sound complicated,but it is a simple intuitive way to communicate color changes. A number numb er of vendors make make sca scannin nning g spectrophot spectroph otometers ometers which use CIELAB to scan press sheets.This unit makes color correction recti on sugg ugges esttions ion s based based on on CIELAB LAB readings reading s and and produces produces quality it y control contro l reports repo rts showi showing ng t he Delt Delta a Evariance variance for each each color throughout a press run. Because CIELAB is device independent and covers the complete color spectrum,it is also the ideal way to archive images. Images can be converted from CIELAB to CMYK. If we understand understand the t he concept of color col or space spaces s, it should be be clear that when we create or scan a file for use in a Hexachrome color color document docum ent,, we shou should ld be b e working wor king in RG RGB or CIE CIELAB LAB only.If onl y.If an image is scanned to a CMYK file or an illustration is created in a 7H
• • • • • •
CMYK MYK color space,t space,there here are,b are,by y definit ion,no colors col ors in the t he file fil e which cannot be reproduced with CMYK or four-color process. To take full advantage of the Hexachrome expanded color range,it's important to scan and prepare images in the color space that that offers off ers the larges l argestt pos possible ib le gamut g amut.. CIELAB LAB has the largest gamut of any available color space,but RGB comes close. In a Hexachrom Hexachrome e workflow, workflow,any any files wh which ich are created created or scans which which are made made should shoul d be b e in CIELABor RG RGB form format. at. Not Note e that th at if the th e files are are convert converted ed to t o CMYK,all colors colo rs beyond that t hat color space are permanently lost.To illustrate this point,bring up a bright bri ght RGB image in Phot hotoshop. oshop. Convert it to CMY CMYK K and watch wat ch the th e colors dull. Then convert it back to RGB. The colors beyond the th e CMYK MYK colo colorr space are gone. go ne.T They are lost foreve for ever.The r.The benefits benefit s of CIELABincl in clud ude: e: a signifi igni fi cant cantly ly larger color gamut tthan han C CMY MYK or RGB; a file size size 25% 25% smaller than th an CMY CMYK; converts converts to any format format and you will always always start with wit h the uncompromised promised quality; qualit y; has a separat eparat e lightnes light ness s channel,s channel,so densit density y changes changes will wil l not affect affect color balance; balance; is compatib compatible le with wit h Adobe Photoshop,Adobe Photoshop,Adobe PageMake geMaker, r, QuarkXPress, ress, CorelDr orelDraw aw ® and and others;and device device independency independency is increa increasingly important imp ortant as color mana managegement systems become fully integrated into desktop computer systems. Concepts oncept s and Desig Design n The Hexachrome expanded six-color gamut provides us with the ability bilit y to achieve what what we conceive.No conceive.No longer are we limited limit ed by the th e old, old , imperfec imp erfectt CMY CMYK K palett e.Now we can can design design wit w ith h the t he confidence that we will be able to print precisely what we see on our computer monitor.This is because in most areas of the spectrum, He Hexa xachrom chrome e has a broader color color gamut than RGB monit mon itors. ors. Photography and Illustrat Illustration ion Flat art and photography phot ography brought broug ht into in to a large color space space like RGB or CIELAB can now be reproduced with the same color intensity
H8
• • • •
you see on-screen and in the original itself.And with the expanded range of He Hexa xachrome chrome color choices,artis choices,arti st s and p phot hot ographers can now use a far greater range of materials during image creation.T ation. This is becaus because e the t he work w ork they t hey create create w will ill reproduce reprod uce accuaccurately.More rately. More image sour sources ces than ever before before are are available available to to creative artists and powerful design tools make compositing these images a simp simple le matter. matt er.It It is now possibl possible e to t o create create complex compl ex,, broad gamut works of art that were heretofore impossible to reproduce. With it h Hexac Hexachrome, hrome,we we can now create o origi riginal nal art on deskdesktop computer systems with paint,illustration or 3-D software tools and know that their intens i ntensity ity and fidelity fid elity will wil l be b e preserv preserved ed in the print pri ntin ing g proces pr ocess s. Because ecause Hexachrome Hexachrome lets let s us design direct directly ly in broad-spectrum RGB color space,vivid colors,delicate blends and fine pastels will be faithfully reproduced. The visible difference di fference is readily readily apparent apparent when the th e Hexa He xachrome chrome process process printi prin ting ng method metho d is i s used used to t o reproduce images where: colors are out of CMY CMYK gamut; there is significa ignifi cant nt detail in highlight highli ght and sha shadow dow area areas; precise precise rendering of hues, hues, tones to nes and shades shades is required;and, required;and, when reproducing the more exceptional exceptional ra range of clea clean n brilliant colors such as as green, red,orange,blu red,orange, blue e and and violet. viol et. Scanning An RG RGB scanner is is required in a Hexa Hexachrom chrome e workflow. workfl ow.Des Desig igners ners who utilize the same images in a variety of media,e.g., Hexa exachrome printing, printing , four-color four-color printing p rinting,, multimedia multi media presentapresentations,the Internet,etc.,will want to scan and store the original image in CIELAB.This will insure that the image will always be of the highes hi ghestt quality no matter matt er what the t he intended or future fut ure use. use.
9H
For the most part,images can be scanned in using the scanners we already own,as most manufacturers provide the ability to scan both CMYK and RGB.The scanner may need to be reconfigured to creat create standard RB RBG image files files,, as many flatbed flatbed and drum d rum scanners default to CMYK.The result is a scan with a far greater color gamut than th an standard standard CMY CMYK K which whi ch will wi ll exploit the th e expanded expanded Hexachrome color range while still using normal methods for retouching and color correction. correction. Hexachrom Hexac hrom e color management g reatl y enhances color uniformi ty across across input and output device devices. s.
Color olor Management Syst yst ems To achieve predictable Hexachrome color separations,color must be managed managed throughout throughou t t he production cycle, cycle, from sca scanning nning,, to monitor monit or display display,, to image edit editing ing and ma manipulation, nipulation,to to pa p age layout and to t o fina fin al out o utput put.While .While the Hexachrome Hexachrome process process gives you far more accurat accurat e colors,Hexac colors,Hexachrome hrome color col or mana m anagement gement greatl greatl y enhances enhances color uniform un iformitity y acros across s input inp ut and output out put devices. Color management has the most difficulty with out-of-gamut colors. Therefore,Hexachrome virtually eliminates this problem as most colors are are in-gamut . Color management management t ools and systems systems by Agfa, Agfa, Color Solutions, olut ions,K Kodak, odak, Logo ogoS Soft and other ot her companies com panies supsupport the Hexachrome process. In addition to the above mentioned color management systems, ems, ICC ICC profiles profiles can can be be used used to t o out output put Hexachrome Hexachrome files.An ICC ICC profile is a database that is used by a Color Management Module (CMM) (CMM) to perform per form color conve con vers rsions ions between bet ween different color colo r devices.With the Mac ™ OSextension ext ension ColorS olorSync ync ® 2.x, 2.x,Appl Apple e has implemented imp lemented support for ICC profiles profil es at the t he op opera eratiting ng sys system level.Micros level. Microsoft oft supp upport orts s IC ICC profiles in Wind Windows ows ® 95. 95. Design Software Hexa He xachrome chrome technolog t echnology y has been been licensed licensed to t o today’ t oday’s s most most pop popuular design software producers.This allows us to take advantage of the benefits of Hexachrome without having to change the way we work or the tools we use.Page layout software such as Adobe PageMaker and QuarkXPress directly support Hexachrome.This means that we can continue to place,crop and manipulate images just as easily as before.We can make Hexachrome separa-
H 10
tions from within these programs simply by accessing the built-in Hexachrome libraries and profiles.The programs also separate RGB images into Hexachrome if they are not already pre-separated.
1
2
Adobe PageMaker Adobe Page PageMa Make kerr was the th e first first design design application pp lication wit w ith h built bui lt-in -in supp upport ort for Hexachrome Hexachrome print p rinting. ing. Page ageMa Make kerr achieves this th is through the inclusion of PANTONE Hexachrome digital color libraries and the Kodak ® ICC ICC Color olo r Management Syst ystem which w hich are used in conjunction with the PageMaker sophisticated printing functions funct ions to create and ou outp tput ut He Hexa xachrome chrome color sepa separati rations. ons. Creating Hexachrome documents in PageMaker 6.5 or higher is easy and straightforward.The process is as follows: Kodak ICC must be turned on and is used to set parameters for all placed graphics. The PAN PANT TONE ONEHexachrom exachrome e digi di gittal color colo r lib libraries raries,, includ included ed wit wi th PageMaker,contain 2,000 colors on coated and uncoated stock that can be applied to text and PageMaker created graphics.To select and define Hexachrome colors: • choose choose Element> lement>De Define fine Colors Colors and click New; New; • select PAN PANT TONEHexac exachrome hrome Library coat coated ed or uncoated un coated from fro m the Libraries pop-up menu;and • select elect the desired desired colors colors from the library library.. NOTE: PageMaker does not automat aut omat icall y substi substitu tute te PANTONEHe NTONEHexachrom xachrome e Black for fo r pr ocess black,so be be sure to explicitly apply PANTONEHexachrome Black wherever regular black is required to insure that your document separates parat esproperly.
3
4
The same procedure is used for trapping a Hexachrome document as is used on CMYK or spot color documents. To out output put final separ separations, ations,we we simp simply ly choose the th e P Print rint opt option ion from the File menu,click the Color button,and select the Hexachrome color inks we want to print. For additional addit ional informatio in formation, n, refer refer to t o “Us “Using Adobe Pa PageMake geMakerr 6.5 6.5 for Hexac Hexachrome hrome Production” on page 41.
11 H
QuarkXPress With the release of QuarkXPress 4.0 in fall 1997,the volume of Hexachrome documents has increased.Creating Hexachrome document docu ments s in QuarkXP QuarkXPres ress s is also also a straight straightfor ward pro p roces cess s and and can easily be accomplished by using the following procedure:
1
2
3
4
5
6
7
H 12
In a Hexachrome Hexachrome w workfl orkflow ow using QuarkXPres QuarkXPress s, Quark CMS CMSmu must st be enabled enabled in the XTension ensions s Manager. Manager. From the Preferences menu,go to Color Management and activate Color Management. From Color olor Management Management Preferences Preferences, select PANT PANTON ONE E Hexachrome as the Separation Printer under Destination Profiles. In order to t o simulate Hexa Hexachrome chrome colors on a monitor,t monit or,the he Display Display Correction must also be activated and the Hexachrome Color Model selected from the Display Correction pop-up menu. Hexa He xachrome chrome colors,like colors,l ike all all other ot her colors,are specified specified in i n the t he Color Color dialog box b ox under Edit . He Hexa xachrome chrome colors can can be b e specified specified in in either the Hexachrome Coated or Hexachrome Uncoated Color Model. Images Ima ges can be be pre-s p re-separa eparatted in in Hexa Hexachrom chrome e and saved saved in in DCS DCS 2.0 file format or can be placed in QuarkXPress as RGB images and separated into Hexachrome from QuarkXPress. To output out put Hexac Hexachrome hrome separa separatitions ons,, go to t o the t he Print Print menu and select PANTONE Hexachrome from the Profiles tab folder.Then
select elect Separati eparations ons under the t he Document t ab folder. f older.T The Hexachrome angles and screen rulings are preset in the Print menu and can be viewed in the Output tab folder. For addition addit ional al informati information, on, refer to “Usin “Using g QuarkX QuarkXP Press ress 4.0 4.0 for Hexa He xachrome chrome Product Production” ion” on page 32. Image Manip Manipulat ulation ion and an d Color Color Correct orrect ion Because RGB files fil es are are smaller small er than t han CMYK CMYK files fil es,, the Hexachrom Hexachrome e process allows us to manipulate and process image files more quickly qui ckly and eas easily il y. On-screen On-screen respo response nse times are are fast faster, er, wh whilile es sttorage of files and and images i mages requires requi res less space,allow pace,all owing ing us to exploit explo it the full color gamut of Hexachrome while at the same time speeding the flow fl ow of work through the organiza organization. tion . Photoshop 5.0 can give a softproof of Hexachrome separations.This can be achieved by using the spot color function for multicha mult ichannel nnel images images. On page 30, 30, the proce pr ocedure dure to obt obta ain the Hexa He xachrom chrome e composite composite image im age is describ described. ed.P Phot hotoshop oshop also also gives the user the ability to color-correct images though curves,levels and other Photoshop techniques for image manipulation. Hexachrome Separat Hexachrome Separat ions io ns Hexa He xachrom chrome e six-channel color co lor separat eparations ion s can can eas easily ily be be created from within wit hin page layout applications applicati ons including includi ng QuarkX QuarkXP Press ress and and Adobe PageMaker ageMaker (see (see the t he previous p revious secti section, on, Des Design ign Soft oft ware),as ware),as well as wit wi th an Adobe Adob e Phot Photoshop oshop plug p lug-in -in from Pantone. antone.P PAN ANT TONE ONE HexW He xWrench rench allo allows ws us to preview and create create high hi gh q qualit ualit y Hexachrome separations for use in any design or publishing application.It has a simple-to-use user interface where we can set specific ColorSync/ICC device profiles for accurate soft color proofing. HexWrench generates six-channel DCS 2.0 or Photoshop files which,when which,when imported import ed into a page layout layout program,can be directl directl y output outp ut for printin p rinting g . HexW exWrench rench provides the user user with wit h the t he abilit abilit y to manipulat manipulate e RGB images images for opt optimal imal Hexachrom Hexachrome e impact. impact . For more more informati info rmation, on, refer to t o “Usin “Using g PANT PANTONE ONEHexW HexWrench for fo r HighHighend Production”on page 18.
13 H
Screeni creening ng Options Opti ons Hexachrome lets you choose the screening technique most appropriate for the job by support supporting ing both b oth conventional conventional halft halftone one and high-end hig h-end st ochasti ochastic c scree screening ning.The .There re is no single prefer preferred red screening creening method metho d for pr p r oducing great great Hexachrome Hexachrome jobs job s.The System lets you easily avoid moiré patterns–potentially made even more problematic in a six-color process–by assigning precisely cisely the same same scree screen n angle to t o colors that don’t d on’t print p rint t ogether ogeth er,, such as orange/ orange/cyan cyan and green/m g reen/magenta. agenta.High High screen screen frequencies of at leas least 175 lpi (lines (li nes per inch) in ch) and and higher hig her are recommended recommended but are not necessary to maintain high quality color reproduction. For anyone anyone not familiar with wit h the t he term, t erm,s stochasti tochastic c scree screening ning is a new halfton half tone e scree screening ning technolog technol ogy y th that at utili ut iliz zes extremely small small dots that are printed in a random pattern rather than traditional screen angles. Screening comes in two versions.Stochastic or Frequency Modulated (FM) (FM) scree screening ning,, controls cont rols ink densit density y by varying varying the th e number of dots.Dark areas receive more dots,while highlight areas have fewer dots.CristalRaster ® from Agfa is a notable example of FM screening that is perfectly matched for the rigors of Hexa He xachrome chrome reproduct repr oduction. ion. Amplitude-Modulated screening,or AM screening for short, is the conventional screening method which uses dots of different sizes,but at fixed positions to render tints of color.
1
H 14
Printing Hexachrome Documents on a Desktop Printer Hexachrome documents can be output to a desktop printer which whi ch has a la large rge color gamut by utili ut ilizing zing a Hexa Hexachrome chrome profile profil e in an ICC wo workfl rkflow. ow.T This is because because many des d esktop ktop print pri nters ers and digital proofers now have a color gamut which is up to 30% larger than th an traditional tradit ional offs off set CMY CMYK. This is large large enough enoug h to t o reproduce repr oduce a similar color range as that of the six inks in the Hexachrome process system.The workflow for Hexachrome simulation in an ICC workflow is as follows: The RGB scan is tagged with an ICC profile for the same device on which the image was scanned.
2 3
4
5
The image color data is converted by the CMM into CIELAB. To simu simulat late e Hexa Hexachrom chrome e on t he four-col four-color or device,t d evice,the he CIE CIELAB LAB values for the RGB scan are converted into device specific dot percent values through the use of a Hexachrome ICC profile. The device specific colors are then converted back to CIELAB. When the colors are converted back to CIELAB,the image is mapped to t o Hexachrome Hexachrome color space but in L*a*b* coordinates. coordinates. Some compression (minor) may take place. From CIE CIELAB LAB, the colors colors can now be b e converted to the t he color colo r gamut of the printer prin ter or digita digit al proofer through the t he use use of the printer’ print er’s s ICC profile.T profil e.The he colors are are once again again device dependent, with wit h the t he colors that th at are poss possible ibl e to achieve achieve in Hexachrome, Hexachrome,defined defined in CMYK MYK for the t he printer pri nter or digit dig ita al proofer. p roofer. The RG RGB file wh which ich has been converted convert ed to t o a Hexachrom Hexachrome e simu simulalation as a CMYK file can now be printed directly to the printer or digita digit al proofer p roofer.. Hexachrome profiles are available with QuarkXPress 4.0, PageMaker 6.5, 6.5, Agfa Agfa Col ColorTune orTune Pro ® , Color Solutions, olut ions,C ColorBlind olorBlind and PANTONE ANTONE Color ol orR Ready™. For additional addit ional information inf ormation on this t his topic,refer topic, refer to Appendix Appendi x C, “Simulat imulating ing Hexachrom Hexachrome e Reprodu epr oduct ction ion on o n a Four-C our- Color olo r Printer,” rinter,”on on page 62. Cont ontract ract Proofing roofin g There are are a number of Hexac exachrome hrome proofing pr oofing opt options, ions,from from on-s on-screen “soft “softpro proofin ofing” g” using PAN ANT TONE ONEHexWrench exWrench through hrou gh advanced advanced prepres p repress s proofing proofin g solutions. olut ions.DuP DuPont, ont, Agfa,Fuji Agfa,Fuji and TransC ransCal all support He Hexa xachrome chrome in their th eir proofing p roofing prod p roducts.Oth ucts.Other er analog and digital proofing products are under development but cannot be disclosed as of this date. Hexachrome Hexachr ome SixSix-col color or Ink Set Set In determining which primary colors to select for the Hexachrome color color ink set set,, several everal fact factors ors were considered considered by b y Pantone during duri ng development, including includ ing color gamut , prepress prepress and separations, subject matter,printing press capabilities,lightfastness and print densit density y.The .The outcome out come was a color set set which whi ch can reproduce the th e 15 H
wides wid estt possibl possible e range of colors achieva achievable ble in i n the t he dynamic range of continuo cont inuous us tone image im ages s, plus plu s 90%achie achievement vement of the t he PANTONE ANTONEMATCHING MATCHINGS SYSTEM.T M. The ch choi oice ce of of the t hese se color colorant ants s was critical because they determined the purity and the overall spectral range of the resultant colors. Pantone has formulated a custom,six-color ink set for Hexachrome that includes enhanced versions of process inks (cyan,mag (cyan,magent enta, a,yellow yellow), ),s standard proces pro cess s black bl ack,plus ,plus the addition addit ion of a vibrant orange and green.The high performance,high chroma ink set is available worldwide from PANTONE Licensed Printing Ink Manufacturers.These special inks are purer than traditional ti onal ink sets. sets. Hexachrome CMYK color inks can be used to enhance four-color jobs as well,which minimizes preparation and changeover time time bet ween a four-color four-col or CMY CMYK K and six-col six-color or Hexachrome press run. PANTONE ANTONECol or Guides Gui des As there is no substitute for an accurate ink-onpaper reference guide,Pantone has added a PANTONE ANTONEHexachrome Hexachro me Color Colo r Selec elector t o our line l ine of technical reference reference guides guid es.. The guide contains over 2,000 Hexa He xachrome chrome color combina combin ations ti ons on both bot h coated and uncoated stock and a anyone nyone planning planning to t o print in Hexachrome should have one. If you need to simulate PAN ANTONE TONE MATCHIN CHING G SYSTEM Col Colors in Hexachrome, Hexachrome,s simply imp ly refer t o the th e PANTONESolid olid in Hexa H exachr chrom ome eG Gui uide de for for the t he colo colorr swatch swatch and its it s Hexac Hexachrome hrome primary prim ary tint tin t percentages.
H 16
Pri nting nti ng Methods Hexa He xachrome chrome integrates in tegrates seamles eamless sly in to virtually virtu ally any print pri nting ing environment.Conventional and waterless offset printing is done as usual on a six-color (or larger) sheetfed or web press.Gravure, flexographic and silkscreen methods can also benefit fully from Hexa He xachrome.While chrome.While on press,you press,you can intens in tensify ify up to two colors without wit hout affecti affecting ng the th e gray balance.Y balance.You also also have ample color flexibility flexibili ty to t o improve imp rove subt subtle le colors,especially colors,especially pastels. pastels. Hexa He xachrome chrome files fil es allow many of today’ t oday’s s new new digit dig ital al color press presses to take full advantage of their th eir extended ext ended color capabil capabilitities. ies. However,it should be noted that the color gamut of some digital presses may be inadequate for acceptable Hexachrome simulations.T ti ons.To print prin t Hexachrome Hexachrome simulations simulation s on a digit dig ita al pres p ress s, follow the th e procedures pro cedures described described in Appendix C:Simul C:Simulating ating Hexa Hexachrome Color Reproduction on a Four-color Printer.
17 H
2 USI USING PAN PANTONE TONE HE HEXWR XWRE ENC NCH H FOR HIGH-END PRODUCTION This documentation is an addition to the HexWrench User Manual and covers information on how to get high-end sepa separa rattions with wit h HexWrench. It is recommended recommended tha t hatt the reader reader knows about about the Hexa Hexachrome chrome proces process s and have read read t he HexWrench User Manual.More information on the Pantone Hexachrome process can be found at www.hexachrome.pantone.com or obtained by call callin ing g Pa Pantone. nt one.
H 18
Scanners canners,, monito moni tors rs and printers prin ters detect, detect , transmit transmit and record color informa inform at ion in different di fferent wa w ays. ys. In an an uncalibrated uncalibr ated system,a ystem,an n image scanned canned on three th ree different scanners canners will wil l result result in three t hree different separations.If we print these three scans on three different printers,we will get nine different reproductions of the original.There are many reasons for these differences.Light source,filters and optics opt ics in the t he scanner scanner,, as well as inks, inks, dyes and tone t one reproduction reproduct ion in the printer are just some reasons why the final reproduction differs.That is the reality that we have to live with in color reproduction. But how can can we stil stilll get a color reproduction reproduction in the t he above scenario where the nine images all look the same and also match the original? In a traditional CMYK-based high-end workflow,the scanner is calibrated so that color corrections,gray balance and tone reproduction are translating the light signals from the scanner’s CMYK values that will reproduce a match to the original on the proofing system used.However,the proofing system is made to match the printing conditions. RGB scans scans inst i nstead ead of CMYK At the present time,no scanner can scan directly into Hexa He xachrom chrome. e.F Further, urt her,tthere is no reason reason to scan scan an image image in CMYK MYK because these values already are compressed into the CMYK color space.Instead,scans should be made in RGB which is the largest color gamut a scanner can capture images with,particularly as it corresponds to the filters used in the color separation of reflected light from the original.Some older scanners are not able to scan images in CIE CIELAB LAB or RG RGB forma form at, due to t o an intern in ternal al color compu com putt er which transforms the RGB light values into CMYK before the image data is sent to the Mac.In such a scenario it is possible to convert the CMYK data to RGB in Adobe Photoshop.This transformation ma tion will not increa increase the color gamut,but gamut, but by utilizing uti lizing the satusaturation control in Photoshop,the overall color fullness can be increased.However,this will create colors that will not match the original image completely.
19 H
Color Sync profi les are files that contain information about how color is generated in a specific device.
ColorSync 2.1
ColorSync 2.5
H 20
Color ol orS Sync Pro Profi fi les Whether you scan in RGB or convert CMYK images into RGB,the separation software needs to know what the final reproduction shou hould ld look loo k like. lik e.R RGB values alone are not an exact exact measure measure of color. color.S Similarly, imi larly,wh what at is red for one one scanner scanner will wil l be seen seen as a differdifferent red on another scanner.What is gray on one monitor will have a blue color cast on another monitor.To make a good color match from original orig inal to the final final printed image,the image,t he sepa separation ration soft softwa ware re needs to know more about the scanner or monitor.During the last last few few years,an years,an indu indus stry st standard has been created to to sol solve ve this problem. In 1993, 1993,a group of leading leading software oft ware and hard hardware ware compacompanies in the t he printing printi ng and publis publi shing indus i ndustry try formed the Internatio International nal Color Consortium onsortium (ICC).The ).The result was a standard for how to describe the color characteristics of any color input or output out put device.The device.The characteriza characterizatition on cons con sists ists of a digit di gital al file and an ICC profile for each color device.This file acts like a color interpreter pret er between bet ween the t he device device and a reference color col or space, space, CIELAB LAB. In the th e Mac, Mac, the ICC ICC profiles pro files are hand handled led by the t he Colo ColorS rSync ync sys system extension. The fact that ICC is a standard means that an application that th at utili ut iliz zes ICC profiles profil es,, like HexW HexWrench,wil rench, willl be b e able to reproduce the color images from any scanner,digital camera or monitor representation very accurately.The only thing that is needed is an ICC profile for the source color device and the destination device. Differe Diff erence nce bet betwee ween n cali calibrat brat ion and characterizati on Characteriza haracterizatition on is different from calib calibra ratition. on.W When you calibrate a scanner,you make sure that something that you know is white is detected by the scanner as white.When you measure the dot gain on the press,you make sure that the ink/press/paper is reproducing tones in the expected way.If a device in the color reproduction workflow is uncalibrated,all the images that are processed will be treated incorrectly.To change this,the operator needs to perform a calibration,which usually is different for each device manufacturer.
Charact haracterizat erization is i s not at all all related to t o cali calibr bratio ation.A n.A characcharacterization of a color rendering device in the graphic arts industry is t oday usually usually unders und erstt ood ood as a creatio creation n of an ICC profil profile e for the t he device.Without a characterization of the scanner,HexWrench does not know how the colors on the original look,it only knows what the scanner says that the image looks like in RGB values. The scanner ICC profile acts like an interpreter and describes to HexWrench how the scanner describes colors in RGB. It is very important to understand that a scanner profile does not alter the th e wa w ay the t he sca scanner reads images, images, rath rather er it is a data data file fil e that contains information on how the scanner sees color.If you create create profiles pro files with wit h a profile profil e crea creat ion applica app licatition,it on,it is alwaysrecommended to calibrate the scanner before creating the profile.
In HexWrench HexWrench ther e ar ar e three pop-up menus for specification of which ICC profil es that will be used in the color conversion. conversion. In order to get a match to the scanned sc anned original,the profi le for the scanner has to be selectt ed in th e scanner selec scanner popup menu. If the monit or represenrepresentati on will be treated as the original,the scanner scanner profi le should be set set to Us Use e Monitor Profile and th e corr corr ec ectt moni tor profi le has to be selected selected in the Monitor pop-up menu.
Sett ing up HexWrench HexWrench In HexWrench HexWrench,some ,some settings can be made to specify how the separati eparations ons will be do done. ne.If If thes t hese e are are incorrec incor rectltly y set set,, the th e separa separa-tions will not be to satisfaction.The most important settings are the source profile,image intent and black generation.
Scanner profile pop-up menu
Monitor profi le pop-up menu menu
Print er profile pop-up menu
21 H
Source our ce profi pr ofiles les A source profile contains color information about the input device.If a scanner profile is used,the original that was scanned will be reproduced in print. print . If a monitor monit or profile is used,t used,the he printed reproduction will look like the RGB image on the monitor. Scanner profil pr ofiles es Scanner ICC profiles can be obtained in different ways.In some scanner software,an ICC profile is created in the scanner calibration ti on procedure.Also,some p rocedure.Also,some sca scanner nner manufacturers manufacturers supp supply ly defa d efault ult profiles profil es for each each model. There is als also o a wide wid e range of third t hird party ICC profile generating software that can be used with any scanner to create an ICC profile.(See Appendix B for a list of the most commonl commonly y used ICC ICC profile profile creation creatio n pack p ackages ages.) .) Furthermore,the scanner profile will not automatically tell HexWrench how your scanner sees color.You have to specify the scanner profile in the scanner profile pop-up menu to make it active in the color separation. Monitor profile profil es When using images that are scanned in RGB without knowing which whi ch sca scanner nner was used, used,th the e monito moni torr needs to be b e treated as as the th e source.In this case,the monitor representation will need to be taken as the original to reproduce in print.To get a good reproduction,you then need an ICC profile for the monitor. Monitor profiles can either be obtained from the manufacturer tu rer or created wit w ith h ICC ICC profile profil e applications applicatio ns.. Pantone offers off ers P2C2™, an inexpensive software product that generates a high quality monitor profile in a couple of minutes.There are also other monitor profili p rofiling ng applicatio appli cations ns,, usually usually as as a pa part rt of complete comp lete ICC ICC profile profil e generating generati ng pack packages ages.. (See App Appendi endix x B for a list of of the t he most commonly used packages.) In HexW HexWrench, rench,th the e monitor monit or profile profi le has to be specified specified in the t he Monitor profile pop-up menu. In addition,the sca scanner nner profile popp opup menu has to be set to: Use monitor monit or profile. profile.
H 22
Desti nation profil es Des When you install HexWrench,several Hexachrome and CMYK profiles will be installed in the ColorSync profiles folder.These destinat ion profiles profil es are crea created ted for coated and uncoa uncoated ted paper as well as for Agfa Proof 2. In addi additition, on, for each each substr substrate,a ate,a profile for st st ochastic ti c and convention con ventional al scree screening ning is installed. As ICC profiles only include color characteristic information, the actual actual scree screening ning will not be dependent on the p profile rofile you select.The colors are, are,however however,, managed managed for fo r the t he different di fferent screen creen ing algorithms in the same way it is done for different substrates. Most people that are printing in Hexachrome use conventional screening, creening, usually usually at at a scree screen n ruling rul ing around around 200 lpi.Howev lpi. However er,, it is also possible to use lower screen rulings.When installing HexW He xWrench, rench,tw two o profiles p rofiles are are supp supplied lied as a default default for conventional conventi onal screening:1 creening :175 75 and and 200 lpi.The lpi .The difference difference between bet ween thes these e profil profiles es is the different dot gain you get when using the different screen rulings.If you are using another screen ruling,you can use the one of thes th ese e two tw o that t hat is close closes st to t o wha wh at you are going to use. use.It It is, is, however, however, highly high ly recommended that t hat you use use the th e HexW HexWrench rench Tuner application,which is described on page 19 and 20,to customize tom ize the th e Hexa Hexachrome profiles profi les for the t he dot gain on your press press. Image int ent Depending on the original you scan,some colors might not be achievable in Hexachrome.They fall outside the range of possible colors that can be obtained.These are most often bright and light colors that can be achieved in RGB and achieved in a transparency.W cy.When hen we print p rint on pa p aper, per, these these bright, bright , highly chromatic chromatic colors cannot be achieved due to the subtractive color mixing that occurs on paper.W paper. When colors in the t he original orig inal are not availa available ble to to reproduce,they are considered to be outside of the color gamut. These colors have to be reproduced as good as possible to achieve the same feeling as the original.This can be done in different ferent ways and specified specified in He HexW xWrench through t hrough the th e use use of differdiff erent image intents int ents.. There are t wo direction d irections s we can can go to t o reproduce out-of-gamut colors.Either the chromaticity can be
HexWrench wil l not sc HexWrench screen reen the separa separations, tions, but it will separate se parate t he images for diff erent screening screening color characteristics.
The Rendering Rendering in tent is selected se lected in t he Image Int ent pop-up menu.
23 H
A
B
HexWrench allo ws the user t o HexWrench divide the pr evie eview w image into four se segments gments (A).Then,using the “step “step and repeat” repeat” function (B),the (B ),the same same port ion of the image can be seen seen in all f our panes.Each panes.Eac h of th ese segments can ca n be configured configured for diff erent image int ents and and profil e selections.
decreas decreased so that th at the t he bright bri ghtnes ness s is matched,which matched,w hich means that th at the colors will be “was “washed out” out ” but will ma m aintain the th e overa overallll contrast trast in i n the t he image.T image. This is what what happens in the t he Photo Photographic graphic rendering intent, int ent,which which is the default rendering intent int ent in HexW HexWrench. rench. The other way to reproduce these bright colors is to maintain the th e color strength trengt h but b ut decreas decrease the t he bright bri ghtnes ness s. In such such a case, case, the colors will be as colorful as in the original,but darker.This is achieved achieved in HexWrench HexWrench by choosing choosing the th e Spot Spot color rendering intent. intent . A third wa w ay is a compromise compromise of tthe he other methods,reducing some of the colorfulness and decreasing some of the brightness ness will generate generate a reproduction in bet ween the phot ographic ographic and spot spot rendering int i ntent. ent. In HexW HexWrench, rench,th this is is called called Graphic. The question then is how to know when to use the different rendering int i ntents ents.. Ma Many ny users users only use the photographic phot ographic image intent.This is good when reproducing images with large areas of colors that fit inside the color gamut or with small areas that are bright and colorful and fall outs out side the th e color gamut. gamut. However, However, often oft en images that are being bein g used used for Hexachrome Hexachrome are are very satura atur ated with wit h large l arge area areas s of bright b right colors. colors. To reproduce repro duce these colors faithfully,the Graphic or Spot image intents perform much better.It is easy to see in the preview window the difference between the image intents.For example,divide the preview into four parts using using phot p hotogra ographic, phic,gra graphic phic and spot ima i mage ge intents in three of the four parts and RGB in the fourth.Then zoom into a bright and colorful area.You will then easily see which intent is most suited to your image.Very often the graphic image intent in tent is a bett better er choice than the photographi phot ographic c, becaus because e of the nature nature of the the images that are usually usually used in Hexa Hexachrom chrome, e,i.e. i.e.,, bright and chromatic colors. Black Black generat ion io n in HexWrench HexWrench Black generation generatio n in HexWrench HexWrench ut u tilizes ilizes a high high level l evel of GC GCR. This means that dark and gray colors are built up with primarily black ink as the darke darkening ning component. In four-color reproduct reproduction ion,,many users users prefer a gray gr ay balance balance which wh ich uses uses cyan,magent cyan,magenta a and yellow togeth to gether er with wit h black. black. Na Natu turally rally,, this th is way of black black genera generatition on can can b be e
H 24
used used in Hexachrome. Hexachrome.In In He HexW xWrench rench though t hough,,it was decided to use use primarily prim arily black for black generat generat ion, due to limit li mitations ations in convenconventional ti onal scree screening ning.. In conventional screening it is possible to use up to six primary colors.The reason is that a maximum of four angles can be used used without wit hout the risk of a moiré pattern.At first first gla gl ance,this nce,t his would mean that only four primary colors can be used for conventional screening. creening. But, ut , in fact, f act,s six primary p rimary colors can can share the four screen creen angles without wit hout caus causing ing overprinti overprin ting ng of two t wo colors with wit h the th e same same screen angle. angle. The secret is that orange/cyan and green/magenta are complementary colors.This means that when cyan and orange are overprinted,no secondary chromatic color will be created,but a dark brown color.Thus there is no need to print cyan and orange at the t he same same time ti me,, which whi ch means means that th at orange can can be printed pri nted at the same screen angle as cyan.The same procedure can be used for green/magenta. green/ magenta.G Green is prin t ed on the th e same same scree screen n angle angl e as magenta.Howe ma genta.Howeve verr, it is a little littl e more complicat complicat ed then that. t hat. The separa separatition on algorith algori thm m nee n eeds ds to recognize recogni ze this th is so so that t hat the t he two complementary colors will not appear at the same time. When reproducing chromatic colors,this will happen automatically,if a light green color is produced there is no reason to use magenta.But what should we do if we have a green color that is transforming into black in a spread? If we use CMYK to generate gray gray color,i color,itt will be impossible impossible to t o not print green green and magenta magenta in the same place.The answer is to reproduce the black generation with wit h only bla bl ack. ck. In dark areas cyan,magenta and yellow will be added to the black generation to increase the density of shadows.There is no risk risk of getting gett ing a visibl visible e moiré pattern patt ern in thes t hese e ton tones es, asthere th ere is such a high hig h area coverage coverage that any misregis misregistration tration will wil l not no t be noticea not iceable ble as a moiré pattern. patt ern. In He HexW xWrench, rench,th there ere are t wo wa w ays to control cont rol the t he bla bl ack generation in dark areas and Total Area Coverage,TAC.The pop-up menu Black Black level can can be set set to five positions positio ns::+2,+ +2, + 1,0,-1,-2. 1,0,-1,- 2.T The 25 H
higher hig her the value,th value, the e higher high er the th e TAC will wil l be be a and nd more of CMY will wil l be used used when w hen reproducing reprod ucing dark colors colors and, and,in in this t his way, way, increas increase the contrast in the image.The default setting is 0 and is often a good setting. Clipp ing paths Clipping paths work in the same way as normal EPS images;however,you will not have an option to decide when separating the image,i image,iff the t he clipping pa p ath should be b e used used or not. If a clipping path was created in the RGB image before starting HexWrench,it will wil l be used used in the th e sepa separa ratition. on.Howeve Howeverr, if the t he path wasn't wasn't specified as as a clippi clipping ng p pa ath,it will not clip the t he image. image.
The Blac Black k lev el can be adjust ed to i ncreas ncrease e or decrease th e amount of under color addi addi ti on in dark areas.
Usin Using g HexW H exWren rench ch Tun Tuner er HexWrench Tuner can be found in the HexWrench folder when installing installing the t he program.This program.This application ppli cation will wil l print prin t out a target target with wit h about 100 patches,which is printed on your press/paper configuration.The print is then measured with a densitometer that can measure dot percent area.The values are entered either by hand or measured directly into HexWrench Tuner with a ColorTron ™ II spectrophot pectrop hotometer.T ometer.The he data entered ent ered will wil l be used by HexW HexWrench Tuner to create a new Hexachrome characterization for your printing conditions that will w ill be ava available to specify specify in the t he printer profile pop-up pop -up menu in He HexW xWrench. rench. 2 Selec electt New 3 Choose Dot Dot Gain Fixup. (HexWrench Tuner is controlled in fi ve steps). steps).
1 2 3
H 26
Start HexWrench HexWrench Tuner. uner. Choose New New from fro m tthe he File File menu m enu.. Choose Dot Dot Gain Fixup Fixup tar t arget get from the th e pop-up pop -up menu.
4
5
6
7
Double-click on step one and select the profile that you want to have as the basis for your new,customized profile. Double-click on step step t wo and select the t he size size,, shape and and layout of the th e patches. patches.
4 Sele elect ct the profile t o “t une une.” .” 5 Sele elect ct layout of the target. 6 Print t he targe target. t.
Double-click on step three to print the target to the image setter. If you want w ant to t o save save the target t arget as an EPS image image,, you can do this his by selecting file instead of printer in the print dialogue box.When doing doin g this,t thi s,the he Print opt option ion will w ill change to Sav Save.Also e.Also,, specify to print page 1 to 1.As you click on Save,you will be asked how to save the file.The default is PostScript,but in the pop-up menu, you should select “EPS file Mac St Standard preview.” preview.”G Give the t he file fil e a new name that identifies it as page 1.When the EPS file is created, you have to repeat the procedure procedure for pages 2,3,4 2,3,4,5 ,5 and 6,ea 6,each ch time giving it a new name. Choo hoos se Sa Save in in the file file menu m enu to save save th the e HexWrench HexWrench Tuner Tuner project.
27 H
If you print directly to the imagesetter,you either make a proof or go to press press with the th e targe t arget. t. If you created EP EPSfiles,th files, thes ese e can can be be placed in the page layout application of your choice and then imaged imaged and proofed or prin printed. ted. Load d the t he HexWrench HexWrench Tuner Tuner Project you saved in 7. 9 Loa measure each each patch wit w ith h a densito10 Double-click on step 4 and measure meter that is set to read dot percent area. save the th e custo customized mized dot gain 11 Double-click on step 5 and save characteristics as a profile with a new name.The file has to end with .SAME. 8
10 Measure Measure t he pat ches. 11 Create Create the pr ofile.
Save th the e HexWrench Tuner Tuner Project file for future fut ure reference. reference. 13 Quit HexWrench Tuner. The new profile will be available in the printer profile pop-up menu found fou nd in i n HexWrench. HexWrench.
12
H 28
3 USI USING AD ADOBE OBE PHOT PHOTOS OSHOP HOP 5. 5.0 0 TO SOFTPROOF SOFTPROOF HE HEXACHROM ACHROME E SE SEPARA PARATI TIONS ONS Images sep separated arated throu hrough gh PANTON ANTONE EHexWrench exWrench can be opened in Photoshop through the HexW HexWrench DCS DCS 2.0 2.0 filt filter. er. In Pho Phottoshop 5.0, 5.0, it is possible to get a preview of the Hexachrome separation and use the curves tool to make color changes in the image.
29 H
1 2 3 4 2 Bring up the Channel Channel palette.
5
When the th e HexW HexWrench rench image is opened,Phot opened,Photos oshop hop will wil l trea t reatt it as a multichannel image where each channel is a masking channel. The default color for such masking channels is red.In Photoshop 5.0, 5.0,you you can change the th e way multichannel mult ichannel images are viewed viewed on the monitor monit or by using using the t he spot spot color function.This function.This is how it i t is accomplished: Open the HexWrench DCS 2.0 image in Photoshop 5.0. View the t he Channel Palette. Double-click on Hexach Hexachrom rome e Cyan. Click on the radio button for Spot Color and change the Solidity to 0 percent. Click on the color swatch and enter the L*a*b* values for the Hexa He xachrom chrome ep prim rimaries aries..
4 Choose Spot Spot Color and 0 (zero) (zero) Solid Solid it y. 5 Enter t he L*a*b* L*a*b* values as listed in the table below.
L*
a*
b*
Hexachrome Cyan
50
–33
–52
Hexachrome Hexachrome M agenta
51
79
–8
Hexachrome Hexachrome Orange
70
52
84
Hexachrome Yellow
92
–5
86
Hexachrome Green
61
–73
32
Hexachrome Black
14
–2
–1
6 7
8
8 Shift -clic -click k on all channels. channels.
H 30
Click OK. Repeat this process until all Hexachrome primary colors have been specified. When all six Hexa Hexachrom chrome e primaries prim aries are set, shift hift-cli -click ck on all the t he channels to get a color preview on the monitor. The Hexachrome L*a*b* values shown in step 5 above are measured standards for the Hexachrome primary color inks printed at the t he correct correct dens d ensitities.T ies.Thes hese eL L*a*b* *a*b* values values will wil l then t hen be int i ntererpreted by the RGB setup in the Color Settings sub-menu of the File menu in order to get the correct RGB values on screen. Depending on how closely the settings in the RGB setup correspond to the monitor,a moni tor,a better bett er softp softproof roof can can be b e achie achieve ved d by changing the th e L*a*b L*a*b** values values by visually visually comparing the th e scree screen n view and a Hexachrome proof or print.
Using t he Cur Curves ves functi on f or color changes changes With all channels selected as shown in step 8,there are several Photoshop functions that can be used to change or correct colors in the separation.One of the most popular tools is the Curves function,located in the Adjust sub-menu of Image.Here,each channel can be controlled with the familiar transfer curves. Saving avi ng singl sin gle e DCS 2.0 fil fi l es In Photoshop 5.0,there is built-in support for saving DCS 2.0 files. The Photoshop DCS 2.0 document format allows the user to save these images as a single file,which sometimes can be more convenient than the multi-file format that HexWrench DCS 2.0 uses. When doing doi ng so,t so, the names of the t he HexW HexWrench channels need to be changed so that they do not include the parentheses and the values in them.
In the Curv Curv es function, you can alt alt er the cur ves for eac each h channel and see see the eff ect on t he screen. screen.
In Photoshop 5.0,it is possible to save DCS 2.0 files as a single file.
Creating reati ng Photoshop Actions The setup of the colors for each Hexachrome primary cannot be saved aved as a default, as it involves in volves a sett setting ing for each channel.T channel. This means that the procedure described in the steps on the previous page can be time consuming in daily production.For that reason, it is recommended that users record the steps as a Photoshop Action. Action. More informatio information n on how to crea create a Photoshop Action Acti on can be found foun d in i n the t he Adobe Phot Photos oshop hop User Manual. Manual. When doing the recording of the Action,you can also choose if you want to change the name of the channels so that you can save the file with the Photoshop DCS 2.0 filter and thus be able to save single file DCS 2.0 images.
31 H
4 USI USING QUARKXP QUARKXPR RESS 4. 4.0 0 FOR HEXACHROME PRODUCTION This section describes how to use QuarkXPress 4.0 for Hexachrome production.It is strongly recommended that the user also read the manual and other documentation supplied from Quark in order to fully understand how color is handled in QuarkXPress 4.0.
H 32
In order order to prin p rintt Hexachrom Hexachrome e colors,t colors,the Quark Quark CMS extension has to be installed and activated.CMS stands for Color Management System and is a general term for characterizing how different color devices handle colors and how these devices can be linked to each each other ot her and get a predict predictable able color res result ult.. Quark Quark CMSis described in an addition to the QuarkXPress manual called “ A Guide uide to to Col Color or Manageme Management nt and Prepress repress,” which whi ch is a good source source if you want to have more information about Color Management and it i ts implement impl ementatio ation n in QuarkX QuarkXP Press ress 4.0. 4.0. In 1993,a group of companies in digital prepress formed the International Color Color Consortium Consortium,, ICC ICC, to d develop evelop standards standards on how ho w the color reproduction characteristics of color imaging devices should houl d be b e made.The made.The result result was the th e ICC profile specifica pecificattion. ion . An ICC ICC profile is a file that is used by a Color Management Management Module Modul e (CMM) to perform color conversions between different color devices. With the Mac OS extension Color olorS Sync 2.0, 2.0,Apple Apple has implement imp lemented ed supp upport ort for ICC profiles at at the th e operating system ystem level. l evel. With appli app licatio cations ns like QuarkXP QuarkXPress ress 4.0, 4.0, wh which ich are comp compatib atible le with wit h ICC ICC profiles profil es,, color conversions conversions can can be m made ade betwee betw een n any combination of color imaging devices and get predictable and accura accurate te color output outp ut . In order for this t his to happen,the user user must must have ICC profiles for each color imaging device that is used in the workflow.When installing Quark CMS,several profiles will automatically be installed installed.. However, owever, many more profiles profi les can can be used, used,ifif required. Before you start using Color Management, be sure sure that that you have a profile for each color device that you are using,e.g.,scanner, ner, monitor monit or,, desktop desktop printer prin ter and printing print ing press press. If you do not have have one or more m ore of thes t hese e profiles profil es,, they th ey are available available from the th e manufacturer of the device.To make using Color Management easier and to minimize mistakes when selecting profiles,it is best to put away awa y any any profiles profi les that th at you are not utili ut ilizing. zing.IC ICC profiles profil es in the th e Mac OS are stored in a folder called Color olorS Sync Profiles Profil esunder under the Preferencesfolder Preferences folder in the System folder. Profiles can be moved by dragging dragging into in to the t he folder. folder. 33 H
There are three three categori c ategories es of ICC ICC profiles: pro files: • Input or source profil profiles es are scanner profiles, profiles,di digi gittal camera profiles, pro files, or any imaging device that read color from a medium. • Output or destination profiles profil es are prin ter profiles p rofiles or any any other ot her imaging device that record color information on a medium. • Monitor profiles profil es can can be b e trea t reatt ed as bot both h source and desti destination nation profiles depending on how the color management is set up to be performed. Quark CMS must be enabled in t he XTensions XTensions Manager for Hexachrome Production. In th e Color M anagement Preferences,sett ings can Preferences,sett can b e made to se select lect sour ce and destin des tin ation pr ofiles which will pr ovide a calibrated calibrated color output. To be able to out put Hexachrom Hexac hrom e se separati parati ons, th e PANTO ANTONE NEHexachro me pr ofi le th at comes wit h QuarkXPress QuarkXPress needs to be select select ed as th e separation se paration pr int er er..
H 34
Sett ing up Quark CMS In order to use the Quark CMS,it must be enabled in the Xtension Manager found under the Utilities menu.If Quark CMS is not found foun d in the lis list, it can can be be reinstalled from from the t he QuarkX QuarkXP Press ress 4.0 4.0 installation CD. When Quark CMS is installed, a new opt op tion called Colo Colorr Management is available in Preferences under the Edit menu.By default, color management is swit switched ched off. Color Management Management can be activated without having a document open.The settings that are made in the Color Management Preferences will become the new default settings.If a document is open,the changes that are made in the Color Management Preferences will only be effective only in the active document. The Color Management preference dialogue box is divided into three parts, parts,the the destination destination profiles,the default source profiles,and settings for selecting the color space that will be color managed by QuarkXPress.
Desti nati on Profi Des Profi les In this section,the user can specify which profiles to be used for the monitor,compos monit or,compositite e printe print er and separation printer.T printer. The Monitor Monit or pop-up menu selection is used to simulate how the colors will appear when printed on the selected composite or separation printer.The composite printer is normally set to the desktop color printer that is used when making color printouts.The separation printer uses the profile for the printing press or film-based proofing device that will be used. The composite printer will automatically be used unless the Separations eparations check check box in i n the t he Print Print dialogue box b ox is selected. If it is checked,the separation profile will be used. As QuarkXPress 4.0 is programmed so that it assumes that all composite printers are four-color devices,it does not allow profiles with wit h more than th an four channels channels t o be selec selectt ed.Thus ed.Thus,, t he PANTONE Hexachromeprofile Hexachrome profile must be selected as the Separation Printer, even even if i f you are are not going goin g to t o use Quark Quark CMSto perform color col or conversions. Defaul Defa ultt Sour Sour ce Profiles Profi les The three tab folders, RGB, CMYKa CMYKand Hexachrome, are used used to to specify the default source profiles that will be used for images imported and colors created in QuarkXPress. RGB defau defaultlt source our ce profiles profil es Typically this means that the default RGB profile for Image should be the t he scanner scanner profil profile, e, wh whilile e RGB Color olo r defined d efined in QuarkX QuarkXP Press ress should houl d use the monit mon itor or profile p rofile as the th e source. source. CMYK MYK defa defaul ultt source our ce profiles profil es If images are scanned directly into CMYK or if they are preseparated, eparated, a SWOP profi profile le can be b e as ass signed ig ned as the source.The source.The SWOP profile should also be selected in the Color pop-up menu.
Hexachrom e source Hexachrom source profi les are not applicable,as there is no file format t hat allows Hexac He xachrome hrome informat ion t o be color managed.
Hexachrome default source profiles As of this writing,it is not possible to set either the Image or Color source profile as Hexachrome in Quark CMS,as QuarkXPress 4.0 does not support any file format wit w ith h six channels channels.. However, owever, 35 H
Hexachrome separation can b e Hexachrome simulated simula ted on the monitor .
Hexachrome Coated and Hexachrom Hexac hrom e Uncoated Uncoated r efers t o t he PANTONE PANTONEHexachrom e Color Selector Selector fan guid e from Pantone. NOTE:When sending your docu d ocu-ment to an output service for film, it is important that you send send all profiles used used in the t he document document , along with the file. Profileswork in much the t he same same way as fonts and images;they are only linked lin ked to the document,wit document,wit hout them, the color management cannot work properly.
Hexachrome Hexac hrome colors,l ike all other colors,are specified in the Color dialog box under Edit Edit .
H 36
QuarkX QuarkXPress ress does sup suppo port rt files files separat eparat ed in Hexachrom Hexachrome e wit with the t he DCS DC S 2.0 2.0 file format fo rmat.. Unfo nfort rtunat unately,DC ely,DCS S files canno cannott be color color manmanaged.It aged. It is is possib possible le to to manage Hexac Hexachro hrome me if the t he colors colors are selected from the Hexachrome Coated and Hexachrome Uncoated color models.T m odels.Thes hese e colors do not require source profiles profil es but can can be color managed through Quark CMS because they are defined in device independent color and can be accurately reproduced to any output color space. Display Correction In the pop-up menu Display Correction,the monitor can be set to simulate the separation printer,the composite printer or display colors bas based on monito moni torr characteris characteristitics cs.. If the th e monitor monit or appearance appearance is of littl lit tle e importance impo rtance,, Display Display Correction can can be set set to t o Off,mea Off, meanning tha t hatt the color will be ma mana naged ged at at the printing print ing stage stage,, but not be displayed on the monitor preview. To have the monitor simulate the Hexachrome output,the separation printer must be set to the PANTONE Hexachrome profile and the Display Correction to Separation Printer Color Space. Color ol or Cor Correc rectt ion io n This scroll list shows the different color spaces that QuarkXPress can can use use ICC ICC profiles profil es to color manage.By manage.By default default,, color correction cor rection will be enabled for RGB images.This means that any RGB color or image that is used in the document will be color managed through the profiles that have been selected in the preferences. NOTE:The color space CMYK is disabled from color management. This means that colors specified in CMYK and images separated in CMYK will not be color managed by Quark CMS but will pass unchanged unchanged to t o the t he printer print er.. The color colo r space Hexachrome Hexachrome Coated and Hexachro Hexachrome me Uncoated refers to the colors printed in the PANTONE Hexachrome Color Selector.This color reference guide from Pantone includes 2,000 colors printed in Hexachrome on coated and uncoated un coated paper.If paper. If color management is i s disabled disabled for t hese hese t wo color models,th models, the e scree screen n values indicated indic ated in the th e PAN PANT TONE ONE
Hexachrome Color Selector will be used when color separations are printed.If color management is enabled,the Selector colors will be color managed with the profiles specified for Composite Printer and Separation Printer. If you are going to send your document to a service bureau for final final output outp ut,, it is important tha t hatt you send send all all profiles p rofiles used used in the th e document t ogether ogeth er with the t he file.Profiles file.Profiles work in the th e same same way as fonts and images;they are only linked to the document, without wit hout them the t he color manageme management nt cannot cannot be made. made. Specifying Hexachrome colors In the th e Colors dialogue box under under tthe he Edit menu,there are three color models where Hexachrome colors can be selected, Hexachrom Hexachrome e Coat oated,Hex ed,Hexachr achrome ome Uncoated Uncoat ed and Multi Ink. Hexachrome Coated and Hexachrome Uncoated These 2,000 colors are printed in the PANTONEHexachrome Color Selector.This elector.This Selector is printed prin ted on coated coat ed and uncoated un coated paper p aper with different process mixes of the Hexachrome colors.Each color is identified with wi th a number relating relating to t o the t he page number number and color number on each page.To find the same color in the PANTONE Hexachrome Coated and Hexachrome Uncoated color model, simply imp ly key in the th e number for fo r the t he color found fou nd in i n the t he PAN PANT TONE Hexa He xachrome chrome Color Color Selector Selector or scroll scroll though th ough the th e color list. Multi-Ink This color model m odel is divided divid ed in t wo parts, part s,C CMYK MYK and Hexachrom Hexachrome. e. When Hexachrom Hexachrome e is select selected, ed,any any mix of Hexachrome colors colors can can be specified. specified.T The preview color on the t he monito moni torr is not neces necessarily accura accurate te and should houl d be b e used used wit w ith h caution. cautio n.S Selecting Hexac Hexachrome hrome dot area values give professional users large possibilities for color control in the design. design. Hexachrome colors can also be specified with all color spaces that have been selected in the Color Management Preferences references to be color col or corrected. corrected. As an an exampl example, e, if color correccor rection is enabled for CMYK,any color specified in CMYK will be converted to Hexachrome when separations are printed,if the
PANTONE Hexachrome Color Selector i s specified specified in t he Hexachrome Coated and Hexachrom Hexac hrom e Uncoated Color Model.
Process Proces s colors i n H exac exachrom hrom e can also be specified b y user’s specific percentage breakdown.
Hexachrome color s can Hexachrome can b e converted f rom CMYK CMYK by specify spec ify ing a Hexachrome profil e as the separat separat ion print er in the Color Color Management Preferences.
37 H
When placing an image in QuarkXPress,, a source profi le QuarkXPress can be as assigned signed to t he image.
The Profile Information li sting shows sho ws the profi le that is chochosen se n for the selected selected pi cture box.
H 38
PANTONE ONEHexachro Hexachrome me profi profile le is is specified peci fied as the separat separation ion prin printter in the Color Management preferences. In the same way w ay,, a P PANT ANTONE ONEHexachrome exachrome Color Color Selec Selecto torr color can be simulated in CMYK if color management is enabled for Hexachrome Coated or Hexachrome Uncoated and the separation prin p rinter ter is set set to t o be b e a CMYK MYK profile.In profil e.In o order rder to t o simulate Hexa He xachrome chrome colors correctly correctl y on a four-color four-col or device d evice,, the th e color gamut of this t his device needs needs to approximate the Hexachrome Hexachrome color gamut.If the color gamut is smaller,the Hexachrome colors will be reproduced reprodu ced as as close closely ly as possibl possible e wit within hin the th e four-color gamut of the output device.Many desktop printers have color gamuts that th at are close close to t o Hexac Hexachrome hrome but, bu t, in some cas cases,the es,t he color lookup loo kup tables in the printer may need to be disabled in order to achieve the complete color gamut of the printer print er.With .With such such a printer, printer, a Hexachrome simulation can be achieved.An ICC profile for the desktop printer is required in this workflow. Separat ing in g Hexachrome Hexachrome images im ages Images can either be separated directly from within QuarkXPress using Quark CMS or pre-separated from another application and placed as DCS 2.0 files.As the color gamut of CMYK images is already already compres comp ress sed to to fit inside the t he CMY CMYK K color color gamut, gamut, there is no reason to use CMYK images when separating into Hexachro Hexachrome. me.Inst Instead, ead,C CIELABor RG RGB is the th e preferred preferred color color space for images i mages that th at will w ill be separa separated ted int i nto o Hexachrome. Hexachrome. When placing an image into a QuarkXPress document that has a color model enabled to be color corrected by Quark CMS, the open dialogue box will allow the user to specify a source profile for the th e image.Usually image.Usually the source profi profile le is a sca scanner nner profile, p rofile, but if the t he image image is computer genera generated, ted,the the monitor monit or profile shou hould ld be b e chosen chosen as the source source profile. profile. Make Make sure sure to to select select the t he check box Color Correction in order to color manage the imported image. With the PANTONE Hexachrome profile selected as the separation printer,the image will be separated automatically when the document is printed prin ted as separati eparations ons..
A good way to keep control of the profiles that are assigned to individual images is to show the ProfileInformation Informat ion listing listing under the View menu.With menu.With a picture box active, active,the the profile that is assigned to the image is shown,as well as the color space of the selected image. When placing PANTONE Hexachrome previously separated DCS DC S 2.0 2.0 images into int o QuarkX QuarkXP Press ress, it is import imp ortant ant that the channels channels are named as the italic names below: Hexachrome Cyan Hexachrome Black Hexachrome Magenta Hexachrome Orange HexachromeYellow Hexachrome Green
Images can can be p re-separated in Hexachrome and saved in th e DCS 2.0 file f ormat or can be pl ace aced d i n Quark XP XPress ress as RGB im ages and separ ated into He Hexac xachrome hrome fr om QuarkXPress.
Print ri nt ing He Hexac xachrom hrome es separati eparati ons When Color Management is enabled in the Color Management preferences preferences, an extra tab t ab folder, fol der, Profiles, is ava available ilable in i n the t he Print Print dialogue logu e box.In box. In Profiles, rofiles, the th e compo compos site it e and and sepa separr ation ti on printer prin ter can can be be changed. If the t he PAN PANT TONE ONEHexachrom exachrome e profile profile is i s select elect ed for for the t he separat eparation print pri nter er,, QuarkX QuarkXP Press ress will out outpu putt He Hexa xachrom chrome e separaseparations only if the Separationscheck Separations check box in the Document tab folder Choose the PANTONE Hexachrom Hexac hrom e profi le as th e separation se paration pri nt er. Hexachrom e separati Hexachrom separati ons are enabled when clicking in Separat Separat ions. The Hexachrom Hexachrom e angles and screen sc reen ruli ngs are preset preset i n the Print menu.
39 H
is checked. checked.With With the PAN PANT TONE ONEHexachrom exachrome e profile profile selected, elect ed,tthe Output tab fold f older er will wil l show the th e six six Hexa Hexachrome chrome colors activ activa ated. As Hexachrome uses the same screen angles as CMYK,the options opt ions for scree screen n angle (as well as screen creen ruling rul ing)) will wil l refer to t o the t he setting ett ings s for cya c yan,magent n,magenta, a,ye yellow llow and b black lack.. Ascyan and and orange are complementary colors and will make gray when mixed togeth to gether er at at the th e s same ame pixel pixel in the th e color separ separation,thu ation,thus s cyan cyan and orange can share the same screen angle without causing moiré problems.The same is true for green and magenta which are also complementary complement ary colors. colors. If CMYK and and H exac exachrom hrom e colors and/or images are used used in the document, the user user has the opti on to print the CMY CMYK K colors on the Hexachrome CMYK or to pri nt CYMK and and Hexachrome Hexa chrome separat ions.
H 40
If CMYK colors and Hexachrome colors are mixed in the same document,the user will be asked when printing Hexachrome separations if the CMYK channels should be printed on the same plates as Hexachrome CMYK or if they should be imaged asseparate plates. plates. Ho However wever,, in this t his workflow,if workflow, if color colo r management is enabled for CMYK,this option will not be available as the CMYK colors will be simulated in Hexachrome.
5 USIN USING G AD ADOBE OBE PAG PAGE EMAKE AKER R 6. 6.5 5 FOR HEXACHROME PRODUCTION This section describes how to use Adobe PageMaker 6.5 for Hexachrome production and serves as a supplement to the user manual and to make it easier for the user to understand how PageMaker 6.5 handles the PANT PANTONEHexachro exachrome me colo colorr space.However space. However,, it is strongly recommended that the user also read the document documenta ation suppli supplied ed from Adobe in order order to t o fully full y understand how color is handled in PageMaker 6.5.
41 H
PageMaker 6.0 was one of the first software programs to support Hexa He xachrom chrome. e.In In the the 6.5 6.5 release,the e,t he color colo r managing has been improved imp roved and and it is thus recommended recommended not to use use the th e 6.0 6.0 releas release. For this reason,the information presented in this section will only relate to PageMaker 6.5. Hexachrome color separations can either be made internally in PageMaker or be pre-separated through softwares like PANTONE ONEHexWrench HexWrench,, Agfa ColorT ColorTune une or ColorS olorSol olut utio ions ns ColorBlind ® Edit. Edit. Hexachr Hexachrom ome e pro proces cess s mixes from from the t he PANT PANTON ONE EHexachr Hexachrom ome e Color Selector can be specified through the PageMaker Color libraries.These libraries.These values can later be changed by the users to customized to mized proc p roces ess s mixes mixes.. PageMaker ageMaker util ut ilizes izes ICC ICC profiles profil es to do d o the t he convers con version ions s from RGB to CMYK or Hexachro Hexachrome. me.T There are tw t wo Col Color or Matchi M atching ng Method Meth ods s to choose choose from, from,K Kodak ICC and Apple App le Colo ColorS rSync. ync.In In order to do Hexachrome,the Kodak ICC CMM needs to be used. Using PageMaker ageMaker f or color separati on With applications like PageMaker 6.5 that are compatible with ICC profiles profil es,, color conver con vers sions can can be made between b etween any combination of color imaging devices and get predictable and accurate color output.In order for this to happen,the user must have ICC profiles for each color imaging device that is used in the workflow.When installing PageMaker 6.5,several profiles will automatically be installed installed.. However However,, many more profiles profi les can can be used, used,ifif required. Before you st start, art , be sure sure that that you have h ave a profile pro file for fo r each each color device d evice that th at you are using, using, e.g., e.g.,s scanner, canner, monito moni torr, desktop desktop printer and printing press.If you do not have one or more of these profiles profil es,, they th ey are available available from fro m the t he manufacturer of tthe he device. device. Profiles can also be created for each individual device by using color management management applications.(S applic ations.(See ee Append Appendix ix B for a list of the th e most commonly used applications.) To make using color management eas easier and to t o mi minimi nimiz ze mistakes mistakes when selectin selecting g profiles p rofiles,, it is best to put away any profiles that you are not utilizing.ICC profiles H 42
in Mac OS are stored in a folder called Color olorS Sync Profiles Profil esunder under the Preferences folder fol der in the System folder.Profiles folder. Profiles can be moved by dragging them into the folder. There are three t hree categori c ategories es of ICC ICC profiles: pro files: • Input or “s “source profiles pro files”” are sca scanner nner profiles,d p rofiles,digi igital tal camera profiles,or any imaging device that read color from a medium. • Output or “des “destitination nation profiles p rofiles”” are printer prin ter profiles p rofiles or any any other ot her imaging device that record color information on a medium. • Monitor profiles profil es can can be b e trea t reated ted as bot both h source and desti destination nation profiles depending on how the color management is set up to be performed.
The Color Color Management pref erence sett sett ing is reached by selecting CMS Setup... in General.
When instal installiling ng PageMaker, PageMaker,tthe Kodak ICC ICC system system extension extension is is installed installed in the t he Extens xtensio ion n Folder Folder in the System Folder.In Folder. In the ColorS olo rSync fold folder, er,tthere are also also installed i nstalled several everal Colo ColorS rSync profil profiles. es. Most of them are for CMYK,but two of them, hexhsid2.pf and hexnsid2.pf, are Hexachro Hexachrome me profi p rofiles. les.Any Any RG RGB or CMYK image can be separated through these profiles into Hexachrome separations. Before this can be done,the CMS Setup in the general preferences needs to be set up correctly.
A
B
C D
To separate Hexachrome images,, the following sett images sett ings need to be done: Color Management Manage ment needs to b e switched On (A). The Kodak Kodak ICC needs to be specified (B). The Separati on Print er has t o be one of t he supplied supplied Hexachrome Hexa chrome pr ofil es (C). The scanner sc anner or monitor profi le for your system should be selected as th e sour sour ce pro fil e (D). (D).
In CMS CMSSetup etup , the Kodak ICC Profile rofi le needs needs to be selected. select ed. In Sepa eparatio ration n printer print er,, the th e PANTONEHexachro ONEHexachrome me High High SID or PANTONEHexachrome Normal SID profile profil e needs to be selected. selected. See Appendix A for information on the solid ink densities (SID) for Hexac Hexachrome. hrome.P Pantone recommends using using t he profile pro file for f or normal SID. 43 H
When pl acing RGB and and CMYK images, the Source profil e and images, Renderi Re nderi ng Int ent can be set set for eac each h image, by selecting selecting CMSSource (A). ( A).
Placed images can b e Placed export ed as a Hexachrom Hexachrom e separation.
H 44
The default source profile for RGB and CMYK can also be selected here. here. If you want to reproduce reproduce the sca scanned original in print, print , you should select your scanner profile as the RGB Ima Image ge Source our ce.. If you want to reproduce the appearance of the RGB image on-screen, you should select the monitor profile that matches your monitor model. mod el.It It is also also poss p ossible ib le to t o place p lace CMY CMYK K images images into int o PageMa PageMaker ker and let let Kodak ICC re-separate re-separate thes t hese e int in to Hexachrom Hexachrome.T e.This his can be be useful useful if you have to reproduce reprod uce a CMY CMYK image in a print job tha th at otherwise uses Hexachrome.The added benefit of using Hexachrome,in terms of color gamut,will be lost when using preseparated CMYK images because they are already compressed into the CMYK color gamut.For that reason,it is not recommended to scan images in CMYK that are going to be separated into Hexachrome. When placing pl acing an RG RGB image int into o PageMa PageMaker ker,, you can overo verride the default source profile by choosing CMSSource...,which CMSSource..., which will give you a dialogue box to select the source profile and Rendering intent in tent.. Rendering intent in tent will wil l adjust adjust the t he color separ separation ation depending on the type of image.It is normally suggested to select Image in this t his pop-up menu,which menu,w hich is the best best choice for photographical phot ographical images. images. When the t he image is placed in PageMak PageMaker er,, there are are two tw o choices for how to make the color separation.The image can either be separated and saved into a file or maintained as RGB and sepa separa ratt ed during output out put to the printer print er.. • Select the image you you want to t o export export as a Hexac exachrome hrome separa separatition. on. Then choose Graphic in the Export sub-menu ub-m enu under File.TIFF File.TIFF and DCS DC S can be chose chosen n as file format. fo rmat. However, However, the files created can only be used in PageMaker,which reduces the usefulness of the function.The separated image will automatically be relinked to the image that you placed. • The other option is i s to keep keep the t he RGB image in tthe he document document and let Page ageMa Make kerr do the th e sepa separation ration when the t he document is sent sent to the imagesetter.The second option will mean that the printout will take a little longer,but it also means that you can easily
change printing processes by changing the Separation Printer profile in CMS Setup. To print prin t separati separations,t ons,the he Color part in the Print Print dia di alogue box needs to be set to Separations.It is also necessary to de-select the conventional CMYK plates and activate the Hexachrome primaries. When Hexachrome Hexachrome color s are specified i n PageMaker and/or pre-separated DCS DCS 2.0 images from HexW HexWrench rench are placed placed in PageMaker, PageMaker, th e Color dialogue b ox in Print will include the Hexachrome Hexachrome primaries when Separations (A) is chosen.
A
Specif pecif ying yin g Hexachrome pr p r oces ocess s col color ors s The PANTONE Hexachrome Color Selector is a guide printed by Pantone which includes 2,000 process colors in Hexachrome Hexachrom e Selector Hexachrom Selector Color s can be spec specifi ifi ed in th e PANTO ANTONE NE Colo r li br brari ari es.
printed prin ted on o n coated and uncoated un coated paper p aper.The .Thes se colors can can be be defined in PageMaker through the PANTONEHE ANTONEHEXACHROMECoa OMECoatted and PANTONEHEXACHROMEUn OMEUnco coa ated color libraries.These libraries are selected in Define colors... under the Utilities menu. When a Hexachrome Selector color is chosen,the Hexachrome 45 H
dot percent areas will be shown.These values can be customized, if wanted, for arbitrary Hexachrome Hexachrome proces p rocess s mixes mixes. The PANTONE Hexachrome Color Selector consists of 2,000 process colors prin ted in Hexachrome.
After specifying specifying a He Hexac xachrome hrome color,t he process process mix can be changed cha nged if wanted.
H 46
6 HOW TO US USE E ILLUST LLUSTRA RAT TOR AN AND D FRE FREEHA HAND ND FOR HEXACHROME PRODUCTION Hexa exachrome is a big big oppo opport rtunit unity y for design designers ers to enhance the effect on vector art illustrations; however however,, t he two two main appl applications ications for this,Adobe Illustrator and Macromedia FreeHand,have little supp upport ort for He H exachrome xachrome product prod uction. ion.T This paper paper describes how to utilize Illustrator and FreeHand to their fullest capability for Hexachrome production.
47 H
FreeHand 7.0 and 8.0 support Hexachrome,but images and illustrations need to be printed from FreeHand.It is not possible to export Hexachrome files from FreeHand to be placed in a page layout applicati application,li on,like ke PageMa PageMaker ker or QuarkX QuarkXP Press ress. Illus Illustrator does not have supp support ort for Hexac Hexachrome. hrome.Howev However er,, with wit h some some adjustm adjustments ents,, bot both h Illustrator Illustr ator and FreeH FreeHand and can be us u sed fo forr Hexa He xachrome chrome produ p roductio ction n quite quit e succes success sfull y. Usin Using g FreeH FreeHand and for f or Hexachr Hexachrome ome separat separat ion io n With it h applications applicati ons like FreeH FreeHa and 8.0, 8.0,whi which ch are compatibl comp atible e wi with th ICC profiles,color conversions can be made between any combination of color imaging devices to get predictable and accurate color output.In order for this to happen,the user must have ICC profiles for each color imaging device that is used in the workflow. Before you st start, art, be sure sure that t hat you you have a profile pro file for each color device that you are using, using, e.g., e.g.,s scanner,monit canner,m onitor,d or,des esktop ktop printer and printing press.If you do not have one or more of these profiles profil es, they th ey are are available available from the th e manufactu manufacturer rer of the t he device. device. Profiles can also be created by the end user with profiling applications.P ti ons.Plea leas se refer to Appendix App endix B for a list of the th e most most commonly commonl y used applications.To make color management easier and to minimize mistake mistakes s when selecting selecting profiles profil es, it is best best to put awa away y any any profiles that you are not utilizing.ICC profiles in the Mac OS are stored to red in a folder called called Color olorS Sync Pr Profiles ofil esunder under the Preferences In Preferences, Preferences, th e Color Color category ca tegory Kodak Digital Science (A) and PANTONE Hexachrom Hexac hrom e Normal (B) have to be selected.
A B
H 48
folder in the System Folder. Profiles can be moved by dragging them into the folder. There are three three categori c ategories es of ICC ICC profiles: profiles: • Input or “s “source profiles p rofiles”” are sca scanner nner profiles,d p rofiles,digi igital tal camera camera profiles,or any imaging device that read color from a medium. • Output or “des “destitination nation profiles p rofiles”” are printer prin ter profiles p rofiles or any any other ot her imaging device that record color information on a medium. • Monitor profiles profil es can can be treated t reated as bot both h source and and d des estitination nation profiles depending on how the color management is set up to be performed. In Ad vance vanced d Color Management, Manage ment, the\ compos compos-ite profi le and and default image profi le can be select select ed.
A
In the information palette, the source profi le can can b e selected se lected in t he Image sour sour ce pop-up menu (A).
When ins i nstallin talling g FreeHa reeHand, nd, the th e Kodak odak CMM syst ystem extension is installed installed in Extens xtensio ions ns in the System Folder. ol der.In In a folder called ICM, located in the main FreeHand Folder,the Hexachrome profile (HEX_NSID.ICM) is installed.Any RGB TIFF image can be separated through th rough this th is profile into i nto a Hexa Hexachrome chrome separa separatition. on. Before this thi s can can be done, done, the Color management setting,in etting, in the Color category,in the Preferencesmenu Preferences menu selection,in the File menu,needs menu, needs to be set set up correctly.The correctly.The Type has to be Kodak Digital Science.The Separation printer hasto b e PAN ANT TONEHexachr ONEHexachrome ome Normal Normal,, which is positioned in the top of the pop-up menu. In Advance dvanced d set settings, ings,the the default source profile and the profile for the composite printer can be selected.It is also possible to check the th e Composite simulates separations, which means that if you have a large color gamut printer,like the DuPont Digital Waterproof or the Scitex Iris Realist digital proofer,you can simulate Hexachrome separations before making films and contract proofs. 49 H
When placing p lacing a RGB image,t image, the Informati Information on palett p alette e can can be used to override the default source profile. Specifying pecifyi ng He Hexachrome xachrome proce pr oces ss colors colors The PANTONE Hexachrome Color Selector is a guide printed by Pantone which includes 2,000 process colors in Hexachrome, print prin t ed on coated and u uncoated ncoated paper p aper.The .Thes se colors can can b e defined in FreeHand through the PANTONEHEXACHROME Coated and PANTONEHEXACHROMEUn OMEUnco coa ated color libraries l ibraries.. These libraries are selected in the Options pop-up menu in the Colorspalette. Colors palette.
Hexachrom Hexac hrom e Selector Selector Color s can be specified specified in t he PANTONE®HEXACHROME Coated and PANTONE® HEXAC HE XACHR HROME OME Uncoat ed col or libraries. The PANTONE Hexachrome Color Selector consis consists ts of 2,000 process colors prin ted in Hexachrome.
H 50
Print rin t ing He Hexachrome xachrome separati separations ons In the Print dialogue box, b ox,s simply imp ly choose choose Separations. Separations. By clicking on the Setup...button,you Setup... button,you can see the Hexachrome primaries and the screen angles that wil w illl be be used. used.If If you only onl y see see CMYK MYK in here,t h ere,the he PANTONEHexachrome Normal profile has not been specified in the Color Management... setup.T etup. This can can be b e changed from the th e Print dialogue box and will also be reflected in the Preferences. Preferences.
If you specify pecif y spot spot PAN ANT TONE ONEColors olo rs,, they can be b e converted convert ed int in to process colors with the check box Print rint spot colors colors asproces pr ocess. This will will print pri nt the clos closest est CMYK MYK simulat imulation ion to the t he PAN PANT TONE ONE Colors olo rs,, not the th e simul simulation ation in Hexac exachrome. hrome.
B A
In the Print dialogue box, Separati ons (A) needs to b e specifi spec ifi ed. In Setup ...(B ...(B), ), you will see the dialogue box below.In below .In order t o get the Hexachrom Hexac hrom e pri maries, you need to select select the Hexachrom Hexac hrom e profi le in Color Color Management (C),if this has not been done already already in t he Preferences dialogue box .
C
Workar ounds for Hexac Hexachrome hrome pr oduction in FreeH FreeHand and and Illustr Illustrator ator There are three possible workarounds that can be used both for FreeHa reeHand nd and Illustrator Illustr ator to export export He Hexa xachrome chrome illustrations il lustrations before they are finally placed in PageMaker,QuarkXPress or other Hexa He xachrome chrome compatibl comp atible e page layout applications. appli cations.
51 H
1 2 Specify the colors colors in the FreeHand or Illustrator ill ustrat ion as RGB GB..
2 3 4 5
Using HexWrench This technique in volves rasterizing the th e illus ill ustrati tration on in Phot hotos oshop hop,, separating the image in HexWrench and then placing the image in PageMaker or QuarkXPress. Create reate a Monitor Monit or profile p rofile using P2C2. Specify the colors you use in RGB.Trust the monitor preview. Save the Image as an EPS. Open the image in Photoshop. Select RGB and the appropriate resolution for the final image.
5 Whe When n opening the image in Photoshop, the resolut resolut ion (A) has to b e set set .The color Mod e shoul d b e RGB RGB (B).
A B
6 The image needs needs to b e flatt ened in order for HexWrench HexW rench t o separate the image correctly. 7 Specify the graphic image intent (A) and the monitor profil e you created created with PANTONEPerson al Color Col or Calibrator in t he monitor pop-up menu (B).
H 52
6 7
Flatten latt en the ima im age. Use Use HexW HexWrench rench to t o separ separa at e the th e image. Select Graphic Graphic image intent. int ent. Select elect the th e monit mon itor or profile p rofile you created created w witith h PAN PANT TONE ONEP2C2.
8
Click on Separate and locate where you want to save the separation. 8 When sepa separating rating the image, a DCS 2.0 fil e will be created.
By opening the image in Photoshop 5.0 and utilizing the preview functionality described on page 30,you get a softproof of the separation. 10 Place the image in PageMaker or QuarkXPress. 9
Saving avi ng EP EPS fil es wit wi t h spot colors color s One limitation with EPS files is that there is no color identifier for more than four colors.However,there is no limit to the number of spot colors. Specify th e six six Hexachrome primaries as spot colors. When creating When creating the ill ustration,t he six primaries have have to b e used. used. Each color color p art can b e colored from 0-10 0-100 0 percent. Make sure sure that t he overprint op tion i s chec checked. ked.
53 H
In both PageMaker and QuarkXPress,the Hexachrome colors are defined defined with w ith the following fol lowing color names names:: Hexachr Hexachrome ome Cyan Hexachrom Hexachrome e Magent Magenta a Hexachr Hexachrom ome e Yellow ellow Creatin g obj ects using using spot colors that are overprint ing can ca n be done in t wo ways, ways, depending from where the final illustration illustration will be prin ted. QuarkXP QuarkXPress ress allow s the user to specify t he CMYK CMYK par t of a Hexachrome im age as a conventio nal CMYK CMYK color. At the print ing stage, stage, the user user can select select i f t he CMYK CMYK color color s should be print ed on individ ual plates or merged with t he Hexachrom Hexac hrom e CMYK CMYK plates. If the illustration illustration will be printed fr om PageMaker, PageMaker, th e CMYK CMYK parts need need to be divid ed into the indi vidual Hexachrome Hexachrome spot channels.
Hexachrome Black Hexachro exachrome me Orange Orange Hexachrome Green
Hexachrom Hexac hrom e Orange:50 Orange:50 % Hexachrome Magenta:80 % Hexachrome Hexa chrome Yellow: Yellow: 100 % Hexachrome Black:5 %
For u se when placing illustrations in PageMaker.
Hexachrome Hexac hrome Orange:50 % CMYK:0%,80%,100%,5%
For u se when placing ill ustrat ions in QuarkXPress QuarkXPress 4.0. 4.0.
This means that if these colors are used in an illustration, they will be separated in the correct plates when printed.This can be utili ut iliz zed in Illustrat Illustrat or and Free FreeHa Hand nd to t o colorize colo rize simp simple le illus ill ustr traations.To create an object with a mix of two or more colors,the object has to be duplicated and the trapping setting needs to be set to overprint overpri nting. ing.T This will,howeve wil l,however,make r,make it difficult d ifficult to know what the final object color will be as neither Illustrator nor H 54
FreeHand can give an accurate composite color of objects that are overprinting.This limits the usefulness of this technique to simple imp le illus illu strations. rati ons.In In FreeHand reeHand 8.0, 8.0,tthe Lens Lens fun functi ction on can be set set to show transpare transparency ncy,, but this function does not work in the t he same way as transparency of printing inks. If the th e illustra illustr ation ti on is i s going to be plac p laced ed in QuarkX uarkXPress ress, the th e Hexachrome CMYK component can be specified as conventional CMYK.When Hexachrome Orange and Hexachrome Green are needed in the Hexachrome process mix,they are defined as spot colors.
1
2 3 4
5 6 7
Placing EPS files in PageMaker There is a special workaround to print EPS images in Hexachrome when placed into PageMaker. Make Make the th e illustr ill ustratio ation n using solid oli d PANT PANTON ONE EColors olo rs in Illus Illu strator rato r or FreeHand reeHand.. Save the image as an EPS-file. Create a new PageMaker document. Define “Solid oli d in Hexachrom Hexachrome” e”colo colors rs for the t he same same solid PAN ANT TONE ONE Colors olo rs used used in in the t he EP EPS file.Mak file. Make e sure sure that t hat the names names specified pecified in in the PageMaker file matches the names used in the EPS illustration. Place the EPS image in the PageMaker document. Do not import the colors defined in the EPS file. Print rin t Hexachrom Hexachrome e separatio separations. ns.
55 H
6 FR FRE EQUE QUENTLY NTLY AS ASKE KED D QUE QUES STION TIONS S HexWrench Q When I make a separation through
HexWrench,I get an error message -491.Why?
Q The HexWrench separations do not
match the original. How can can I cali cali-brate the separations?
Q The skin tones t ones in my separa eparatitions ons are
built up with mostly orange and black.Is black .Is that correct?
H 56
A The reason for this error is that the
storage device on which you are saving the t he sepa separation ration is i s out of memory. Save ave the separation onto ont o a disk with enough storage space space to hold the separa separated ted image.T image. The separation separation will wil l be double the size of the RGB image. A As HexWrench utilizes ColorSync
profiles for color conversions conversions,, it is important to have a ColorSync profile for the scanner you are using. Depending on your scanner software, ware, this ca can be done with the scanner soft software ware or created using ICC profiling applications. applications. If the image you are separatin separating g comes from a stock photo CD or was created in a computer without a photographic image as the original,it is recommended recommended to t o use a monitor monit or profile for your monit monitor.Contac or.Contactt your monitor manufacturer to obtain that profile. A Yes. es. HexWrench HexWrench was w as designed design ed to t o cre-
ate a black black generation generation with wit h much under color removal.The primary reason for this t his is that in order to print prin t Hexachrome separations with conventional venti onal screening, screening, only four screen screen angles can be used. As cyan and orange are complementary colors, these can print at the same screen angles.This angles.This is also also true tru e for magenta and green.However,when creating separati eparations ons in this way w ay,, the th e black generation needs to be created using using mostly black to eliminate eliminat e printing cyan and orange at the same screen screen angle, angle, which whi ch might migh t caus cause e moiré problems probl ems if the print ing is gett getting ing out of register.
Q When I prin printt th the e HexWrench separasepara-
tions from QuarkXPress 3.3,I will get seven se ven films,t film s,the he six Hexachrome Hexachrome colors and a sevent seventh h process p rocessblack separation.Why do I get two blacks?
Q When I place the HexWrench separa-
tion in QuarkXPress 4.0,I don't get the Hexachrome primary colors in the Colors palett palette.Is e.Is that correc cor rect? t?
Q When I create separatio separations ns with wit h
HexWrench,bright and saturated colors in the RGB image become washed was hed out and desaturated desaturated in the separation.Why does this happen?
A This is a problem that occurs in
QuarkXPress 3.3x but is fixed in QuarkXP QuarkXPress 4.0.If you yo u are not able to to print pri nt using u sing QuarkXPres QuarkXPress s 4.0,you 4.0,y ou can still stil l use QuarkXPres QuarkXPress s 3. 3.3x 3x and simpl simp l y ignore the seventh process black separation. es. QuarkXP QuarkXPress does not add t he A Yes. Hexachrome primary colors automatically because they th ey are treated as process separations and not as spot colors.If you want w ant QuarkXPre QuarkXPress sst o always add the colors when creating a QuarkXP QuarkXPress ress docum do cument ent,, you can add them before b efore creating creating a QuarkXP QuarkXPress document docum ent.. A Colors that are bright and chromatic
in R RG GB are technically impo i mposs ssible ibl e t o achieve in any subtractive printing system system (ink-on-paper). (in k-on-paper).T These colors that fall outside the color gamut of Hexachrome can be reproduced in different ways. ways. Either the t he chromaticit y can be reduced to match the brightness of the colors.This is normally good for phot ph otographs ographs.T .The he other way w ay to reproduce out-of-g out-of-gamut amut colors is to keep the chromaticity high,allowing t he brightnes bright ness s to be reduced. This is generally recommended for images with large areas of clean,saturated urated colors.If you see see that bright colors are are getting gettin g washed washed out, the reason is i s that you have ha ve HexWrench set to the phot ographic rendering rendering intent. If you use use the graphic rendering inten int ent, t, the colorswill be mor e saturated.
57 H
QuarkXPress Q When I choose colors in the
Hexachrome Coated/ Hexachrome Coated/ Uncoa Uncoated ted color palette,the palette,t he printed print ed Hexa Hexachrome chrome percentages are not the same as in the PANT ANTONEHexachro ONEHexachrome me Colo Colorr Selector.Why are the values differ ent?
Q Is it possible to see the individual
channels or make color corrections for an RGB image that will be separated throug t hrough h the t he selec selected ted PANTON ONE E Hexachrome Hex achrome profile? profi le? opt ion of Q Why don’t I have the option selecti ng t he PANTONEHexa selecting Hexachro chrome me profile in the Color Management preference Desti Destination nation Profiles?
Q When I select a PANTONE
Hexachrome Color from the PANTONECoat Coated ed or PANTONE Hexachrome Uncoated color selector and de-select the spot color check box and print Hexachrome separatitions, ons,Qua QuarkXP rkXPress wi willll separate the PANT ANTONE ONEColor in CMYK. How do I get a Hexachrome separation separation of of a spot PANT ANTONE ONEColor Color? ?
H 58
activating color correction in A When activating the Color Management preference set-u set-up p for f or Hexachrome Coa Coated ted and/or Hexachrome Uncoated,the Hexachrome Hexachrome colors colo rs will be separated separated through t he sepa separation ration printer prin ter profile.To file.To get g et the th e same same Hexachrome Hexachrome values as used in the PANTONE Hexachrome Hexachrome Color Select Selector,t or,the he Color Correction option opti on should should b e unchecked for Hexachrome Hexachrome Coated and Hexachrome Hexachrome Uncoated. A No.QuarkXPress is not capable of
showing separations or making color corrections corrections in the t he image.
A The PANTONE Hexachrome profile
has been moved mo ved from the th e ColorSy ColorSync nc profiles folder in System folder: Preferences.Use the t he Mac OSFind command to search for the file named:HEXNSID2.ICM,which is the name of the profile in the Mac OS. Now place the file in the ColorSync profiles folder.If you don’t find t he file,reinstall file, reinstall the Quark Quark CMSfrom MS from the t he QuarkXPress installat inst allation ion CD. A It is not possible possible to t o color-correct col-
ors from the PANTONE Hexachrome Coated and PANTONE Hexachrome Uncoated color colo r libraries li braries using using ICC profiles profi les.. However, However, this th is can be made by selecting the spot PANTONE MATCHINGSYSTEM Colors Colo rs in i n t he PANTONE Solid To Process color library and when Color Correction is activated for this library in the Color Management Management Preference sett setting. ing. For best result results, s,how however,t ever,the he PANTONE Solid in Hexachrome Hexachrome Guide uid e should be used to define the most optimum Hexachrome values for each solid PANTONE Color.
Q When I import a DCS2.0 image with
CMY MYK K, Orange and Green, QuarkXPress does not recognize these as Hexachrome colors and treats the orange and green as spot colors.Why does th this is happen? Q How do I simulate the PANTONE
Hexachrome Color Select Hexachrome Selector or colors co lors on my desktop desktop color prin ter?
Q When I select to color-correct the
color model “PANTONE Solid To Proces rocess, s,” th the e colors on the t he Hexa He xachrome chrome print do not alw alwa ays match the solid PANTONEMATCHING SYSTEM Colo Colors,e rs,even ven if t hey are wit w ithhin t he Hexachrome Hexachrome color gamut .Wh .Why y does this happen?
A When importing DCS2.0 images that
are pre-separated in Hexachrome,the channels must be named Hexachrome xachrome Cyan,He an, Hexachrom xachrome e Magenta, Hexachrom Hexachrome eYellow, Hexachrome xachrom eBlack, Hexachrom Hexachrome e Orange rang e and Hexachro Hexachrome me Green. Green. A In the Color Management prefer-
ences,select the th e PANT PANTONE Hexachrome profile as Separation Printer and the ICC profile for your desktop desktop color print er as as the Composite Printer.In Printer.In addition, you must enable Color Correction for Hexachrome Hexachrome Coated Coated or Hexachrome Hexachrome Uncoated. A Color Management relies on lookup
tables and algorithms for color conversions between different color spaces and,as color conversions are unilinear unil inear,, some colors can be repr reprooduced slight slightly ly incorrect. Human vision is also more sensitive to color differences.This means that when a solid spot color is compared compared to to a process reproduction,the human eye can detect any color differences. Human vision is much more sensitive than even the most adva ad vanced nced color meas measurement tools to ols and and color concon version version calculations.T calculation s.To solve this th is problem,P problem, Pantone antone hasdeveloped the Solid in Hexachrome Guide that will show visua vi suall comparis comp arisons ons between bet ween each solid PANTONEMATCHING SYSTEM Col Color or and the closes clo sestt Hexa Hexachrom chrome e color. col or.
59 H
APPENDIX A SOLID INK DENSITIES FOR HEXACHROME To ensure that t he Hexac Hexachrome hrome print will reproduce accurate accurate color,it color, it is important tto o keep keep control cont rol over the solid solid ink i nk densit densities ies (SID). Densit Densitomet ometers ers are,by tradition,de diti on,des signed with w ith filters that correspond correspond to t o the cyan,mage cyan,magenta nta and yellow inks.When measuring other colors one of the filters will be used.In the case of PANTONE ONEHexachrome Hexachrome Orange the th e yellow density filter filt er will wi ll be u us sed and for PANTONE ONEHexachrome Hexachrome Green Green the t he cya c yan n density filter filt er will w ill be use u sed.The d.The followi foll owing ng density values are the PANTONE standard values for Hexachrome printing. Note that the Status T densitometer used was a X-Rite Model 428.
PANTONEHexachrome Cyan
1.60
PANTONEHexachrome Magenta
1.50
PANTONEHexachromeYellow
0.90
PANTONEHexachrome ONEHexachrome Orange Oran ge
1.45
PANTONEHexachrome ONEHexachrome Green
1.45
PANTONEHexachrome ONEHexachro me Black la ck
1.75
If you are using using another densitom densitometer eter,, the valuesmight need to b e changed. To do t his,it his,i t is recommended recommended to t o mea m eas sure the primary patchesin the t he PANTONEHexachro Hexach rome me Color Colo r Select Selec t or or t he PANTONEMATCHINGSYSTEM in in Hexachro Hexachrome me and use these th ese densities densit ies as as the standard values.Thes v alues.These e patches patch es can also be used to visually compare and examine the solid ink density. The dot gain should should normally n ormally be around around 25 to t o 28 percent percent in the mid tones when using negative working wo rking plates pl ates..
H 60
APPENDIX B APPLICATIONS TO CREATE CUSTOM ICC PROFILES Agfa,ColorTune 200 Ball Ballardvale ardvale Street tr eet Wilmington,MA 01887 http://www.agfahome.com Tel (508) (508) 658-56 658-5600 00 Candela, Colo olorSynergy rSynergy 1676 East Cliff Road Burnsville,MN urnsville, MN 55337 candela@ candel a@candelacolor candel acolor.com .com http://www.candelacolor.com Color Solut ions, ColorBlind 120 Birmingham irmi ngham Drive, D rive,S Suite uit e 210 Cardiff ardif f by b y the t he Se Sea,CA a,CA 92007 92007 http://www.color.com Tel (760) (760) 436-65 436-6593 93
Gretag, Profi le Maker http://www.gretag.com United States Tel (800) (800) 622-238 622-2384 4 Fax (914) 561-0267 Switzerland Tel (41) 18 42 42 11 11 11 Fax (41) 18 42 21 00 United Kingdom Tel (44) 1619 1619 26982 269822 2 Fax (44) 1753 864905 Germany Tel (49) 89 89 85 70 7 0 Fax (49) 21 04 93 3136
Monaco System, MonacoMatch 100 Burtt urt t Road Road,, Suit e 115 Andover,MA 01810 01810 http://www.monacosys.com Tel (978) (978) 749-99 749-9944 44 Fax (978) 749-9977 Sout hwes hwestt Soft ware,C ware,Color olor Encor ncore e for Scanners 3435 Greystone Drive Austin,TX 78731 http://www.swsoft.com Tel (888) 2-SWS 2-SWSOFT Fax (512) 345-2697
Linotyp e-H e-Hell, ell, LinoC inoColor olor CaptureProfiler LinotypeCPS 425 Oser Avenue Hauppauge, Haupp auge,NY NY11788 info@ info @linocolor.com linoco lor.com http://www.linocolor.com Tel (888) LINOC LINOCOLOR OLOR
61 H
APPENDIX C SIMULATING HEXACHROME COLOR REPRODUCTION ON A FOUR-COLOR PRINTER Over the th e past past several several years, years, Color ol or Management Managemen t Systems (CMS (CMS)) have been develde veloped to the point poi nt where w here they can can now not only be used used to t o achieve achieve accurate accurate color output,but are also capable of simulating press results on desktop printers. In addition,design enhancements to these devices have resulted in increased resolution and color range.Because of these technology advancements,it is now possibl possible e to m make ake not only accurate CMY CMYK K proofs pr oofs on a deskto desktop p prin pri n ter,but ter, but even accurate accurate Hexachrome Hexachrome proofs proo fs.. One keystone keystone is i s the standardiz standardization ation of incorporating in to a digital dig ital file fi le a description of how individual imaging devices will render color.The standard was developed developed by b y a group of digit di gital al prepress prepress and and publishing p ublishing developers which formed form ed the International Internati onal Color Consortium,IC onsorti um,ICC, to focus focu s on the t he issue of accurate accurate and predictable color output outp ut when a variety variety of imaging i maging devices and different software products are used. The result was w as the th e ICC ICC profile specification. specificatio n.E Every scanner,d scanner,des esktop ktop printer, prin ter, monitor,dig monit or,digital ital camera or any other color im imaging aging device can can be calibrated with ICC profiles.There is no need to change anything in the scanning software or buy any additional hardware products.All that is needed is an ICC profile for each device you use and an application that supports ICC profiles. ICC profiles can be obtained from the device manufacturer or created by an end-use end-userr with wit h profile gener ating software.More and more graphic arts applications support supp ort ICC ICC profiles,f profil es,for or exampl example, e,P Photoshop hot oshop 5.0, 5.0,Quark QuarkXP XPress ress 4. 4.0, 0, PageMaker 6.5 and FreeHand 7.0.ICC profiles are supported at the system level with wit h Apple’s ColorSync olorSync extension t o the t he Mac OS OS. In Microsoft Windows Window s 95 a and nd later,ICC profiles are supported at the system level through ICM. Why Why a f our-color device can can simula te Hexachrome Hexachrome In order to meet m eet the market market dema d emand nd for highly h ighly saturated saturated bright and vibrant colors on press, press, in the t he earl early y 1990s,P 1990s,Pantone antone developed develop ed the th e Hexachrom Hexachrome e six-color six-color process pro cesssystem system.. The System uses u ses primary pri mary color col or inks in ks (PANTONEHexachrome Cyan, PANTONEHexach ONEHexachrom rome e Magenta Magent a and and PANTONEHexach ONEHexachrom rome e Yellow ellow)) which are cleaner than standard CMYK,and incorporates two additional primary colors, PANTONEHexachrome Green and PANTONEHexachrome ONEHexachrome Orange. Orange. The same black as in CMYK is used.The Hexachrome process results in the ability to achieve a significant increase in the range of possible colors,as compared to traditional CMYK MYK offset offset printing. print ing. Many Many desktop desktop printers prin ters have have a color range,or range, or color gamut, gamut , 30% larger than traditional offset CMYK.In addition,most high-end digital proofers are capable of achieving a similarly large color gamut;however,in order to do so, their default color lookup tables t ables must be disabled, disabled,as as they are set set to to simulate standard sheetfed sheetfed CMYK MYK inks. inks. Color gamuts g amuts are,however,not are,h owever,not uniform unif orm H 62
in shape shape between bet ween different print pri nters.Hex ers.Hexachrome, achrome,for for exampl example,h e,has asan extra extr a color gamut expansion in all regions.A large four-color device such as the DuPont DuPont WaterProof aterProof prin ter has a color gamut volume volum e that is i s slightly slight ly less than th an Hexachrome. The fact that many desktop printers and digital proofers have a color gamut that t hat is almost almost large enough to reproduce the color range as that of the t he six inks in the Hexachrome process system,means that these CMYK printers can do a good job simulating a Hexa Hexachrome chrome sepa separation.The ration.The ques question then is, how to to take a six-color sepa separr ation and fit it i t in to the four colors that the large color gamut desktop printing is using.The answer is:ICC profiles. In applications appli cations like li ke the Apple Ap ple ColorSync ColorSync plugp lug-in in to Photoshop, hot oshop,Qua QuarkX rkXP Press ress 4.0 4.0 and FreeH FreeHand and 7.0,the th e user can can specify a separation separation prin p rinter, ter,for for exampl example, e,th the e Hexachrome printer or a composite or proof printer.By selecting a composite or proof printer,a prin ter,a Hexa Hexachrome chrome color sepa separation ration could be simulated on t hat device providing a desktop Hexachrome proof.These color conversions are made with the th e ColorSy ColorSync nc 2.0 Color Color Management Management Module Modul e (CMM) (CMM) or a third t hird-part -party y CMM. CMM. The CIELAB color space is at the heart of an ICC profile workflow.As CIELAB is a device independent independ ent color colo r space, space, the th e colors are are not related rela ted to any particular particul ar RGB, CMYK or any other device dependent color values.Instead,CIELAB represents a scientific color space,making it possible to make very advanced color transformations matio ns between bet ween devices. devices. In the case case of a Hex Hexachrome achrome simulation,the simulatio n,the source colors are mapped tto o CIE CIELAB LAB colors,th colors, then en converted convert ed to Hexa H exachrom chrome e and and finally fi nally back to CIELAB where it is reconverted to the four-color gamut of selected output device. An example of a Hexac Hexachrome hrome simulati on made th rough ICC ICC profi les To simulate a Hexachrome separation of a scanned RGB image to the large color gamut of a DuPont DigitalWaterP DigitalWaterProof composite prin ter,the ter,t he following followi ng occurs o ccurs:: RGB scan is tagged with wit h an ICCprofile profi le for the th e same same device on o n which w hich the th e 1 The RG image was scanned scanned.. For optimu opt imum m result results,t s,the he ICC ICC profile profi le should be b e based based on tthe he same film type t ype as as the original that t hat will be reproduced. 2 The image color data is converted by the CMM into CIELAB. 3 To simulate simul ate Hexachrome on the th e four-color four- color device,t devic e,the he CIELAB LAB values values for the th e RG RGB scan are converted into device specific dot percent values through the use of a Hexachrome Hexachrome ICC ICC profile.The profi le.The device specific colors col ors are then converted con verted back b ack to CIELAB.When the colors are converted back to CIELAB,the image is a representation of the t he colors that can be printed print ed in Hexachrome. Hexachrome. NOTE:The CIE CIELA LAB B values are mapped mapp ed into int o the t he Hexachrom Hexachrome e color gamut where, dependent on t he image, color compression takes place.Color compression is required where an area of color cannot be achieved in print.This is because while Hexachrome is 50% larger than CMYK,there are some color areas that,due to t he technical technical limit lim itati ations ons of a subtr subtractive active color printing print ing process, are still ti ll not achievable in print .
63 H
The illustrat ions below are two-dimensional repres represenentati ons of conversions conversions between different color spaces spac es.. The illustr atio ns are are only for pr es esentation entation purpose and and are not derived from measured data.A color gamut is a t hree-dime hree-dimenional nional body and is thus diffi cult to present pres ent in prin t.
CIELAB LAB, the th e colors can now be converted con verted to t o the t he DuPont DuPont DigitalWa Digit alWaterP terProof roof 4 From CIE color gamut through the use of a DigitalWaterProof ICC profile.The colors are once again again device dependent,w dependent ,with ith the colors that th at are poss possible to t o achieve achieve in Hexachrome defined in DigitalWaterProof CMYK. 5 The RGB file which has been converted to a Hexachrome simulation as a CMYK file can can now be printed print ed directly t o the t he DigitalWaterP DigitalWaterProof printer prin ter and used, used,ifif desired,as desired,as a contract contract proof pr oof between bet ween the file’ file ’s originator and their t heir customer. customer.
CIELAB color space
Hexachrome color space
RGB color space
RGBcolor range defined d efined in CIELAB
A
Color gamut of desktop desktop prin ter Hexachrome color space defined in CIELAB
Hexachrome color space defined in DigitalWaterProof CMYK
B
1 The Colors from the original scan scan are converted to t he CIELABcolor colo r space. No color is lost, lo st, as the t he CIELAB LAB space space is larger lar ger than t han RGB.
H 64
2 The CIELA IELAB B color colors s are compresse pressed d to fit inside the Hexachrome color gamut .The colors are converted converted back t o CIELAB. AB. Some areas ar eas in t he Hexachrome Hexachrome color color gamut are out side the RGBgamut (A). As the source image is scanned in RGB, there th ere will be no colors color s in thes th ese e areasand tthus hus the sepa sepa ration will not have any colors colors in thi s part part of the color gamut. gamut.
3 The CIELA IELAB B colors that th at represent the Hexachrome colors are converted converted t o the th e color gamut of the desktop printer. Some regionsmight not b e possible to match 1:1;here gamut compression needs to be done by the color management syst em (B).
4 The resu result lt is that t he colors colors that are achieved on the digital proof p roof repre r eprese sent a go od simulation of t he colors colors that will be achieved achieved in print using the six Hexachrome color inks.
NORTH AMERICA Pantone,Inc. 590 Commerce Boulevard Carlstadt , New Jersey Jersey 07072-3098 07072-309 8 U.S.A. U.S.A. 888-PANTONE Tel: (201) (201) 935-550 935-5500 0 Fax: (201) 896-0242
EUROPE Panto Pantone ne U.K., U.K., Inc. 8 Stade Street Hythe, Kent CT21 6BD England Tel: (44) 1303 269666 269666 Fax: (44) 1303 264464
ASIA Pantone anto ne Asia, Asia, Inc. Unit A,15/F A,15/F,Southern ,Southern Commercial Building No.11-13 Luard Road, Wanchai Hong Kong Tel: (852) (852) 2724 2724 8822 8822 Fax: (852) 2724 8800
Visit t he Pant Pant one Web Web sites at www.hexachrome.pantone.com www.pantone.com
