Re: Default ICC profiles
Re: Default ICC profiles
- Subject: Re: Default ICC profiles
- From: Chris Murphy <email@hidden>
- Date: Sun, 28 Jan 2001 23:32:11 -0700
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Ken Applebaum came over to see for himself that ICC workflows
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function at a simple level of press control at around 80 Swedish
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newspapers. The densitometric and visual system used in Sweden is no
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substitute for automated spectrophotometrically-based press control
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systems such as those Heidelberg has been introducing, but
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nonetheless trying to get the presses to run to a standard downstream
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in the workflow is enough to bring down reclaims from advertisers
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dramatically.
The problem isn't just getting process control good enough in the U.S.
The problem is educating advertisers and service bureaus and getting them
to use ICC profiles. In the U.S. there is still resistance to using them.
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If upstream in the workflow grayscale images are tagged with a source
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profile when building PDF 1.3 / 1.4 for digital ad delivery, then you
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know where the grayscale object is coming from.
This is a real problem. Service bureaus tell me that embedded ICC
profiles in PDF files are causing them LOTS of problems. In some cases
these grayscale images are converted to 4/c unless the embedded profile
is removed.
When I save a grayscale image as PDF and embed a 20% dot gain profile,
then open the file in Acrobat 4.05, parts of it are PINK and will print
PINK. I haven't tried making separations yet.
Anyway, as far as I can tell this is certainly a bug in various prepress
and RIP systems that's causing this. But it is happening and I'm not
clear on exactly why. So at this point I'm not embedding ICC profiles in
PDF's.
Chris Murphy