Re: Epson and Agfa Yellow ink behavior
Re: Epson and Agfa Yellow ink behavior
- Subject: Re: Epson and Agfa Yellow ink behavior
- From: Henrik Holmegaard <email@hidden>
- Date: Wed, 28 Mar 2001 07:28:08 +0200
Roberto wrote:
If you are viewing a 2-D graph
projection (the xy-chart or chromaticity diagram) you might see your
matchprint's yellow as being inside your Epson's gamut. But if you look
at the gamut volumes in 3-D, you'll clearly see it sticks out. Matchprint
yellow is indeed of equal or lower saturation, but of higher brightness.
I'm playing with papers, resolutions, black generation, ColorThink ...
The first law of RGB workflows is, 'You can't have in CMYK what you
don't have in RGB'. (The second law is, 'Yipes what a confusion' -:)).
Most users are afraid to experiment with their RGB 'monitor-like'
non-monitor 'working space', and little wonder, so they will take
what Pshop defaults to.
The largest of these default RGB spaces is Adobe RGB. And Adobe RGB
snips pure offset yellow. You are never going to get a pure yellow on
the press.
Therefore, you are always going to be able to proof an Adobe RGB via
an offset simulation space to an inkjet proofer destination space.
And know that your yellows proof correctly.
It doesn't matter what the MatchPrint is able to reproduce. Because
the brighter yellow won't be there in the first place -:).
In a few days I'll finish a virtual 'Choosing Color Spaces' piece ...
(And for those who don't like Lab workflows whether 8 or 16 bit -
Newcolor will scan into RGB, too. It has a gamut comparison function,
too, the same as Coloropen 4 for PC. But no trackball and autorotate
and wobble when you tango -:).)
--
Henrik Holmegaard
TechWrite, Denmark