Hi, I assume you want the simplest way, and really don't worry about exact precision. This is not an issue here, since pantone certification does NOT always tie colors names with exact Lab values. You can use colorimetry only if all used spot colors are inside CMYK gamut, else you have to preserve spacing and things become a lot more complex.
So, first step would be to check what printer/emulation the CMYK is in. Probably SWOP if artwork targets press. Next step would be to see if all used spot colors lies inside gamut. If all used pantone colors are inside gamut then you can safely use colorimetric values. Photoshop can give you SWOP (or whatever) CMYK for given spot color names. If you need just a few colors post here the names and I will give you the CMYK values. Remember first to check if we are dealing with SWOP (important!) Hope this helps Marti Maria The little cms project http://www.littlecms.com [EMAIL PROTECTED] ----- Original Message ----- From: "Jeffrey Horner" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, July 08, 2004 6:51 PM Subject: [Lcms-user] Understanding RGB->CMYK with specific Pantones Help!! I'm a computer programmer who has convinced his wife to standardize on Linux/Gimp for her art licensing business. She saves everything in RGB TIFF, and so far so good... But now she has a particular client who would like her to use specific Pantone colors in her work, and I know very little about color management, CMYK, Postscript Color, and ICC profiles. Essentially there's a manufacturer overseas that wants a digital file of my wife's artwork for test print runs. They need to match the Pantone colors given by the client, and I haven't a clue how to guarantee this. I want her to continue using Gimp and other free software, so I thought that lcms might be the way to go. If anyone can give me some advice on how to ensure her client gets what she wants, that would be great. I literally don't know what to ask the manufacturer, so I'm seeking knowledge on this entire process. Thanks in advance, jhorner ===== J. Horner Software www.jhorner.com 615-347-6899 ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
