No More RGB/Taking a CMYK delivery on
No More RGB/Taking a CMYK delivery on
- Subject: No More RGB/Taking a CMYK delivery on
- From: Doug Walker <email@hidden>
- Date: Wed, 26 May 2004 08:37:05 -0700
Hello all,
I am a commercial photographer who has been following this and
ColorTheory groups for quite some time. I have read cover to cover
RWCM and RWPS and every pdf inbetween.
Recently I had a couple catalog covers go wrong as the supplied
AdobeRGB (which we photographers were preached to as the most versatile
delivery) was somehow hashed and converted to sRGB.
As such, I am going to deliver CMYK instead of RGB.
A couple real world questions.
I spoke with a prepress manager today about their workflow which is
essentially 7 Web presses. He said, "We build our separations based on
US Prepress Default, with 20% dot gain and no color management. 300
TAC, 85 shadow, 4 highlight through 5, 4, 4" He also stated that they
use SWOP (CGATS TR001) to get things close.
When pressed he also said after experimentation (Deviations from
Standard SWOP are - Light Generation, 280 TAC) Hold 3% Highlight Dot
(5C 3M 3Y), 93% Shadow dot (90C 80M 80Y 85K) +1/4 tones, -1/2 tones,
+3/4 tones
What can we glean from this information group? In every day terms.
Here is what I believe to be the correct process to create CMYK
delivery In my color managed workflow. If I am missing a step I would
appreciate any thoughts.
I start with AdobeRGB master 16bit tifs, do major color adjustments,
apply capture sharpening, downsample to 8 bit, softproof, correct,
flatten and convert emmbedding profile.
Also, can I softproof in 16 bit and do corerctions? or must I
downsample to 8 bit and do all softproofing corrections. Also how does
one boost quarter-tones and 3/quarter tones? What does it mean to do
so?
Finally, once the image looks great and gamut is controlled, I presume
it is here where one converts to the needed profile....and then applies
output sharpening (at 100%) and saves out Embedding the profile to be
imported into Quark.
Doug Walker, FP
"Specializing in Corporate People in their Workplaces in a Clean, Bold
Classic Style!"
website:
http://www.walkerphoto.com
Phone (360) 943-1293
Member, ASMP, APA SF
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