Re:CMYKOG profiles and GCR
Re:CMYKOG profiles and GCR
- Subject: Re:CMYKOG profiles and GCR
- From: John Wickham <email@hidden>
- Date: Tue, 6 Jan 2004 14:06:12 -0800
On Monday, January 5, 2004,
Graeme Gill wrote;
This sort of approach generally works really badly. You won't get
anything like the available gamut. This applies to substituting
black for CMY, as well as substituting Green/Orange etc. for pairs
of CMY. Substitution of K for CMY results in a characteristic
gamut consisting of the CMY gamut plus a narrow K cone sticking out
of it. The article "Black generation using lightness scaling" by
Tomasz J. Cholewo illustrates this well (google).
i too read this article recently, which prompted my question on GCR. i
understand the definition of GCR and how in offset it can be beneficial
in reducing CMY ink and in Ink-Jet
how a more pronounced or vigorous black replacement can help neutralize
gray scale when you are stuck with a poor device calibration.
however when an Ink-Jet printer has been brought into fine tune, ink
limiting,dot pattern,linearization and the resultant neutral grayscale
before a profile is made, what use is
UCR, GCR, theoretically ? and how does it affect gamut ?
i understand go make a series of a print with all the different GCR
strategies, see what they look like, and make up your own mind.
just born curious
thank you John
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