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Book Review: Color Confidence by Tim Grey
Monday May 24, 2004
by IR Staff

IR Staff reviews Tim Grey's new book Color Confidence. Included is an excerpt from the book, Chapter 3, which deals with choosing and calibrating Displays.

Creating Panoramas
Monday May 10, 2004
by Ellen Anon

Ellen Anon illustrates the creation of Panoramas in Photoshop.

Working with Pressure Sensitive Tablets
Monday May 3, 2004
by Katrin Eismann

Katrin Eismann outlines the use of pressure sensitive tablets in image processing.

Book Review: Mastering Digital Photography and Imaging(Updated)
Monday April 26, 2004
by IR Staff

IR Staff reviews Peter K. Burian's latest book, "Mastering Digital Photography and Imaging."

Digital Workflow for RAW Processing: Part IV - Batch
Thursday April 1, 2004
by Jeff Schewe

The fourth in a five part series, Jeff demonstrates the application of settings from one image to a series of images within Photoshop.

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Printers > Pre-press and halftone output > RGB to CMYK PS Workflow

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AuthorSubject: RGB to CMYK PS Workflow   [Go to Bottom of Page]
Shayne Lynn
Posted on Thu Jun 3, 2004 5:08 PM

Trying to understand RGB to CMYK in PS. I have ProPhoto RGB files needing to be converted to CMYK. The printer has supplied this info for their CMYK:

SWOP(coated)
Dot Gain 20%
UCR
Black Ink Limit 80%
Total Ink Limit 320% w/ 310% for more detail

They have supplied a printer profile for soft proofing, along with a reference target file to print out. Also supplied is a printed version of that reference target (its a IRIS print by SCITEX). How should I print this reference target file? Convert to RGB? Do I use my IR profile and paper combo?

My workflow so far, I have gone to Color Settings and changed the CMYK to custom (filled in the above info) then saved the settings. Then I opened the ProPhoto RGB file, went to Convert to Profile selecting the above saved CMYK profile. I currently have ACE/RelativeColor/BlackPoint/Dither selected. Would you recommend differently?

Next I loaded their printer profile in OS X - Library/AppSupport/Adobe/Color/Profiles. Their file is labeled PressECI_D.profile. Do I need to change this files name? Or add .icc?

Then I selected Proof Setup, selecting their profile which shows up as PressECI_D.profile-Profile Wizard. Where did this “profile wizard” abbreviation come from?

In Proof Setup what settings should I be using? PreserveColorNumbers/Relative/BlackPoint/PaperWhite/InkBlack? I know this could be image dependent or should I be asking the printer? Currently I use Relative with Black Point Comp. I then sharpened and did color adjustments to the image.

Now I would like to do an Epson 2200 print to create a proof/reference print. I have IR’s profiles. I know I have to convert again but I’m not sure to what?

Thanks for the help.



... this thread contains expert advice from Andrew Rodney.




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