Re: Creating ICCs with pigmented inks
Re: Creating ICCs with pigmented inks
- Subject: Re: Creating ICCs with pigmented inks
- From: Graeme Gill <email@hidden>
- Date: Tue, 02 Jul 2002 16:19:30 +1000
Terry Wyse wrote:
>
Well, since I'm the guy who made the "run the other way" comment, I'll give
>
the reasons for my statement:
>
>
* The 10000CF has a reduced gamut, there's no denying it. For CMYK proofing
>
it's OK but if you want to use, say, the spot color capabilities of the
>
BestColor RIP the reduced gamut becomes as issue.
This is rubbish. In many directions the gamut of the pigment is considerably
greater than the dye. Attached is a .wrl file of the two. The wireframe
is the pigment, the solid is the dye. Notice how the pigment has a greater
extent in the blues, greens and all darker saturated colors, in spite of
using a lower total ink limit. The dye has a different hue to its yellow, and
is slightly less saturated than the pigment. The only area where the
dye has a light advantage is in the magenta. In overall volume, the pigment has
an edge. This is on Epson PhotoGlossy.
>
* Ink stability with the Photo Dye 10K can be greatly improved by choice of
>
paper. A couple of the Best Proofing papers work well.
This may be so, but it makes the dye a game of Russian roulette. How
does the average user know whether it will be stable or not ?
>
* The one thing that really kills the 10000CF for me and customers is the
>
metamerism issue (some say it's better than others in this regard but it's
>
still bad IMO). While it's being viewed in a standard viewing booth you're
>
OK, but you virtually can't let the proof get in customers hands where you
>
have no control over the type of light they view the proof under.
This is greatly influenced by the black generation rule. I haven't seen
any evidence that the pigment is worse than the dye in this regard.
It's a fact of life that all these systems are only going to match
exactly under one lighting condition - none of them are spectral
matching systems. A poor choice of black generation will certainly
lead to "fragile" results, regardless of the ink type.
Graeme Gill.
[demime 0.98b removed an attachment of type model/vrml which had a name of dye_vs_pig.wrl]
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