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Re: Dull/Gloss Varnish Proof
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Re: Dull/Gloss Varnish Proof


  • Subject: Re: Dull/Gloss Varnish Proof
  • From: Marc Levine <email@hidden>
  • Date: Thu, 8 Oct 2009 16:18:19 -0400

Roger,
Thanks for the brain teaser. As far as the technical part goes, I would have to vote "no" on the pursuit of trying to characterize gloss using colorimetry (profiling). I'm not sure that there is a "regular relationship" between your gloss and your color. And..on top of that, you will be at the mercy of the profile's separation logic, which may use "Magenta" where you wanted it to use "Gloss" because, mathematically, that's what the data told the profile to do.


It sounds to me like yo have a custom press condition that you would like to simulate on proof. If it is reasonable to simplify your quest in this way, then I would recommend the following: measure a press sheet(s) that is printed to your liking, and to which you have applied your lam-var technique. Then, use that measurement(s) as characterization to build a reference for your proofing system. I would try to find a proofing media that both hits the white-point of your process and has a "kind of look" the echoes the quality of lam- var press sheet. I suppose you could even go another step to try and use some kind of treatment on the proof to help it better emulate the qualities of your press sheet.

There's a lot to be said for printing to industry specs, and using standardized color spaces to manage your color. That being said, I don't believe that you have an industry-standard process and it would be more work (and less satisfying) to try and retrofit a standardized process (making it non-standard) than it would be to simply make a custom characterization of the press and proof to that.

Final note: every color management transform uses 2 profiles (an input and and output...source and destination). The wiring of the system does not support "combining multiple input spaces". Many users have tried averaging measured data to produce a single data set, which they then use as a reference. I would liken this to playing the lottery. I'm not saying you wouldn't win but..... statistically.... you probably won't.

; )

My 2 cents.

Best regards,
Marc
Color Management Grouper (Mmmmm...grouper.....)
email@hidden
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