Re: profiling deeper colors
Re: profiling deeper colors
- Subject: Re: profiling deeper colors
- From: Steve Upton <email@hidden>
- Date: Thu, 13 Dec 2001 01:13:39 -0800
At 8:48 PM -0500 12/12/01, Peter Merck wrote:
Dear Colorsyncers
How does profiling software handle colors deeper than swop, IOW not really
cyan but bluer than cyan in inkjet printers?
Situation: My rip software can control ink limits in 3 areas; 1)light cyan, 2)
regular cyan and 3)combination C-lc to produce a deeper color than 100% cyan.
I've tried setting up 100%C with a percentage of lc for 2 reasons, one is to
increase ink density and the other was to increase gamut. I'm coming to the
conclusion that this setup does not work very well. My HP 5000 profiles work
very well with very little lc added to C, a gamut larger than my matchprint
profile. My Arizona with large amounts of lc added to C produces a profile
that washed out mid to shadow transitions in blues and reds (M is set up the
same way) and gamuts less than the matchprint. The first profile I made
worked but the image looked washed out, therefore my reasoning for increasing
the 100% ink densities. Since then, the profiles have been trouble.
I use Profile maker and have tried several combinations of GCR/UCR. Viewing
the profiles in Colorthink doesn't give any indication something would be
wrong, even white points seem normal, no uv problems.
Interesting problem. Do the color spaces twist a lot in 3D with
ColorThink? If you are overloading the paper you can get strange
behavior out at the most saturated colors where the hues go a bit
wonky (technical term, I know)
if you look at the raw measurement data do you see it behaving
strangely? I mean, are the saturated colors folding back on
themselves? Do the "darker" patches on the target appear lighter than
they should? Sounds like you may have an inking problem. Just a
couple of thoughts..
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o email@hidden 206.985.6837
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