Re: wide CMYK
Re: wide CMYK
- Subject: Re: wide CMYK
- From: neil snape <email@hidden>
- Date: Fri, 02 Nov 2001 09:13:28 +0100
on 2/11/2001 08:54, email@hidden at email@hidden wrote:
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In a message dated 10/31/01 6:50:10 PM, email@hidden writes:
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> would that work, sounds like a great idea?
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The idea of converting to a large artificial CMYK space to gain a black
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channel, manipulate that channel, then convert back to RGB is problematic in
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several regards. I'll only address the most obvious: if you seperate some of
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the RGB data to black (via some CMYK engine) and leave other on the color
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channels, and then change the data in the K channel, you will end up with
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different densities when you recombine... so you might as well stay in RGB
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(avoiding a whole raft of other problems I'm not covering) and just select
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the tones you wish to effect with one or more of Photoshop's tools... such as
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the global color curve.
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C. David Tobie
I'll agree with the above. For sake of discussion can I add that with Adobe
PressReady there is a unity profile used internally which is a full gamut
cmyk space not connected to device whatsoever. I haven't looked closely into
the values but it is surely large gamut. It should be in the Application
support>Adobe>profiles if you have PressReady. Possibly Peter MacLeod could
give a few more details.....
Neil Snape email@hidden
http://mapage.noos.fr/nsnape