Why can't you go to the Color Settings dialogue and under the
pulldown for the cmyk working space go to the very top and choose
custom cmyk.
In there you can pick the primaries, dot gain, UCR/GCR, black
generation, under color addition as well as total ink limit etc.
After making your selections the cmyk working space will say
something like: SWOP (Coated), 18%, GCR, Custom. You can now pull the
menu down again to "Save CMYK" and name and save that as an ICC profile.
I know that this is probably too simple and not sophisticated enough
for the color gurus on this list but it is an excellent way to create
heavy black profiles with small amounts of cmy ( controlled by UCA
and K gen) for converting black and whites to rich black and whites.
btw it is also an excellent way to generate false RGB working space
profiles different gammas for extremely light or dark RGB images.
Saves tweaking the curves so much.
Clark
On May 26, 2006, at 10:22 PM, Marco Ugolini wrote:
Dear friends and colleagues,
Does anyone have any pointers on how to generate versions of standard
profiles -- like US Web Coated (SWOP) v2, or US Sheetfed Coated v2,
etc --
in which the black generation is higher than is currently the case?
From a cursory analysis of the neutral rendition of these standard
profiles
as viewed in ColorShop X, black generation starts around 35-40%,
proceeding
according to what looks like light GCR.
So, what can one do if one wishes to increase the black generation
in order
to make it easier to keep neutral tones neutral on press? Is there
such a
thing available somewhere as a measurement data file (colorimetric or
spectral) from which to produce a version of a standard profile
with higher
GCR using ProfileMaker, for instance?
Thank you.
--------------
Marco Ugolini
Mill Valley, CA
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