I understand the necessity to limit inks for either bleed or because
there may be no more useful density gain on a given media. I also
understand a profiling app may have an easier time with very well
behaved colors, but I'm questioning the need I've seen expressed for
ink/media hue shift.
This has been covered to a fair degree in the past. There is no
agreement on this list about the usefulness of limiting per channel
inks because the hue changes at higher densities. Some people seem
to think it's a good thing. I can't see any logic in such arguments.
There's nothing "strange" or "wrong" about a colorant changing hue
at different concentrations on the paper. A Lut based profile should
take such things in its stride (that's what it's designed to do).
You're certainly limiting your gamut if you cut such areas of
device response out.
Of course it's possible that a severe change in hue of multiple
colorants could lead to non-monotonic behaviour of the overall
response (ie. more than one colorant value combination produces a
given color), and this can lean to trouble, depending on the
sophistication of the profiling package.
Graeme Gill.
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