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Re: Rich Grey ?
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Re: Rich Grey ?
Subject
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Re: Rich Grey ?
From:
email@hidden
Date: Sun, 19 Sep 2004 13:21:31 EDT
In a message dated 9/19/04 11:43:44 AM, email@hidden writes:
A long time ago I asked a question in this list about the use of
printer profiles for B&W printing with CMYK inksets only.
Neutrality of the greys as the one and only goal.
Someone replied that they made profiles like that called "Rich
Grey ?" Based on an existing printer profile for a CMYK inkset
they edited the profile to deliver a lower gamut with that
inkset, suppress metamerism and increase consistency. I guess a
long black generation and setting the saturation as low as
possible does the trick.
Anyone familiar with that Rich Grey profile method?
Given that a rich black has lots of CMY component in it, this would actually be a poor gray, or a weak gray, in that it would have minimal CMY. The next question would have to be: what type of device, and inks, since reducing metamerism depends on what inks are causing it. If its UltraChrome pigment inkjet inks, then removing all yellow, and using the warm black (and warm gray in those printers that offer light black) plus just enough cyan and magenta to neutralize the results would probably be what you are describing... but that requires a RIP, and ink channel control in the profile, or in the RIP. This would be rich compared to black ink only, but would reduce metamerism compared to full CMYK grayscale printing.
C. David Tobie
Product Technology Manager
ColorVision, Inc.
email@hidden
www.colorvision.com
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