Re: Canned Epson Profiles and black point + linear GCR
Re: Canned Epson Profiles and black point + linear GCR
- Subject: Re: Canned Epson Profiles and black point + linear GCR
- From: Graeme Gill <email@hidden>
- Date: Tue, 27 Jul 2004 14:20:01 +1000
- Organization: Color Technology Solutions
Roger Breton wrote:
Now, the only thing remaining, it seems, is some guidelines for when one
type of separation style is better than the other. I'm thinking of the
traditional silverware image with lots of grays. That image is invariably
better served by GCR with a 'wide' black, isn't it? On the other hand,
portraits may be better served by UCR.
Can we draw some generalizations?
I'm not sure such ideas make any sense any more. When UCR/GCR was an
optical or analog open loop process, then the choice could affect
the end visual result, therefore it could be used as a "twiddle the
knobs till you like the look" sort of control.
In a closed loop profiling situation, this should not hold any more.
The black generation should not directly affect the end colors whatsoever.
Getting the target colors while staying within the TAC of the device should
have priority over the preference settings of under-determined variables such
as black ink level (if this is not the case, then in my option, you're working
with poor profiling software). This means that black generation addresses secondary
issues, such as neutral stability, banding sensitivity, black dot visibility etc. etc.
Graeme Gill.
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