Re: Rel vs Abs proofs
Re: Rel vs Abs proofs
- Subject: Re: Rel vs Abs proofs
- From: Roger Breton <email@hidden>
- Date: Fri, 13 Oct 2006 21:09:55 -0400
Rick,
> Although I see a general preference for the AbsCol rendering for proofing in
> this discussion, don't you find that some people just don't warm up to a pure
> "white" that is registered with ink on the paper?
I know and I agree. That's preferences, (acquired) tastes. It's like onions,
an aquired taste. I'd say sugar is prefered to onions, and RelCol is
prefered to AbsCol.
> I know for myself, I like to
> see clipped areas showing as pure paper with no ink on it,
That's a valid position. Nothing that can't be ignored, though, for the sake
of some 'higher' cause. (please don't take me wrong, I'm not trying to
bellitle anyone here or anyone's opinions when I say "higher")
> Also, since you can't attain a value lighter than the paper, even setting
> accurate a and b values will not accurately simulate a printing stock with a
> higher L value than the proofing stock.
That is so true and I can't disagree with you on that point. My position is
that it is preferable to sacrifice hightlight dot accuracy than accuracy in
the rest of the tone range.
> That being the case, might there not be a case to be made for a hybrid
> colorimetric rendering that is essentially AbsCol except for pure whites, but
> pure white where c0,m0,y0,k0 (or R255,G255,B255) exists in the file?
Just like a Device-Link profile. That's defendable.
> I would
> assume that, if you are converting prior to printing, a blend-if layering of a
> AbsCol and a RelCol rendering, where the AbsCol would be visible if the value
> on RelCol layer is 0 to 254.
That's a valid logic. I think Terry alluded to a similar technique in his
account of how he uses GMG Colorproof to blend in the physical white point
of the substrate with the AbsCol tone range of the image. Neat.
> And also, might a case made for a range of proofing stocks targeted
> specifically to various standard (or common) press stocks?
Well, that is precisely what Kodak (Creo) is doing with the Veris and their
other "dedicated" inkjet proofing stock. Same idea as The Whole Proof, too.
Some precision is gained at the expense of flexibility, if you ask me. I'd
rather have a top-of-the-line proofing RIP, like GMG, and pay 5 to 6 grand
for it, and be able to simulate a variety of stock on it, than pay 50 grand
for a Veris system that would forever lock me into some SWOP certified
Publication or Commercial stock. But that's me.
> RICK GORDON
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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