RGB to CMYK to CMYK - what is wrong with my profile?
RGB to CMYK to CMYK - what is wrong with my profile?
- Subject: RGB to CMYK to CMYK - what is wrong with my profile?
- From: Matthew Kelly <email@hidden>
- Date: Tue, 6 May 2008 10:39:42 -0500
I have recently created a new press profile using ProfileMaker 5.08.
I am getting very good results as far as the proofer matching the
press sheets used to build the profile. My problem is with the RGB to
CMYK conversions. Converting in Photoshop from Adobe RGB 1998 to my
profile, I get poor results in the out of gamut blues and violets.
But if I first convert from Adobe RGB 1998 to Gracol 2006 Coated v2,
and then to my profile, the results are pretty good.
Here are the Lab numbers:
RGB 92 -12 -7
Convert RGB to my profile 77 -23 -7
Convert RGB to Gracol 87 -12 -7
Convert RGB to Graco to my profile 84 -12 -7
I am a little lost as to how to correct this. Are there certain
settings in ProfileMaker, such as gamut mapping or optical brightner,
that would improve my profile?
Matthew Kelly
Prepress Supervisor
Litho Press, Inc.
4334 Milling Road
San Antonio, TX 78219
210-333-1711
email@hidden
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