Epson No Color Adjustment Experiment
Epson No Color Adjustment Experiment
- Subject: Epson No Color Adjustment Experiment
- From: Rick Gordon <email@hidden>
- Date: Sat, 20 Dec 2003 16:05:33 -0800
I've demonstrated to myself the Generic RGB profile is definitely a factor when printing through the Epson Driver in Jaguar. I ran side-by-side prints using Photoshop color management for printing, setting my custom printer/paper profile and choosing No Color Adjustment. One print was printed as with the usual Generic RGB.icc in /System/Library/Color/Sync/Profiles; the other was printed after I swapped in and renamed Wide Gamut RGB to Generic RGB.icc.
The print printed while the false copy of Generic RGB was installed was dramatically reduced in saturation.
So this leads me to several questions:
1) If the output were assigned to the false, higher-gamut version of Generic RGB somewhere in the workflow (as was the case in the second print), why would the results show less, rather than more saturation?
2) What is the real impact of this for printing testcharts and creating printer profiles? If the testcharts are printed after interacting with Generic RGB, and the results are subsequently profiled, would the resulting profile data be substantially different, or would it be essentially the same, since in either case the workflow is consistent. Which I guess really means: In what way does the definition of Generic RGB impact the gamut, tonal range, and linearity of the testchart (or any other print)?
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RICK GORDON
EMERALD VALLEY GRAPHICS AND CONSULTING
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WWW:
http://www.shelterpub.com
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