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Re: Paper white
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Re: Paper white


  • Subject: Re: Paper white
  • From: bruce fraser <email@hidden>
  • Date: Wed, 1 Dec 2004 18:49:26 -0800

At 8:39 PM -0500 12/1/04, Derek Cooper wrote:
So here's the rub. You're shooting a piece of art drawn on white paper. You expose properly, the image has a lot of paper white space, but you're going to get killed when you go to print it.

I've never toyed with absolute colorimetric, as it's never been suggested as a good alternative. I build my own paper profiles and have had great success, with the exception of high white content repros and a lot of bright primaries. It's killer to keep all the colours inline. I can spot read a colour, then adjust the image to match, carefully observing trade-offs in other colours. But you can chase your tail for hours doing this. Perhaps there is a more appropriate workflow for reproduction work that I'm missing. TIA.

You have basically two automatic choices with a lot of manual wiggle room inbetween.


Choice 1 is to reproduce the paper white of the source on the output paper (relcol rendering), even though one may be a different tone and color than the other. This is often desirable because the viewer's eye will adapt to the paper white of the output, and you get to use the entire dynamic range of the output process. If you want to go that route, you either have to expose so that the paper is rendered as white, or edit the image so that the paper comes out white.

Choice 2 is to reproduce the actual color of the source paper on the output (abscol rendering). This too can work well, especially if you light with a view to bringing out the paper texture. The key if you go this route is to trim any uninked paper from the output, so that the eye adapts to the simulated paper white of the source.

Very often the colorimetrically correct answer isn't the commercially useful one, because we can't control the viewer's white point adaptation (though we can exploit it), and because ICC-based colorimetry ignores almost all the contextual effects that our eyes cannot-it just does color matches one pixel at a time, which is not how we view images. Works-on-paper repro presents some special challenges that in my experience can't be handled by color management alone-some interpretation is always needed.
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References: 
 >Paper white (From: Derek Cooper <email@hidden>)
 >Re: Paper white (From: bruce fraser <email@hidden>)
 >Re: Paper white (From: Derek Cooper <email@hidden>)

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