RE: Color Managing an Indigo Digital Press
RE: Color Managing an Indigo Digital Press
- Subject: RE: Color Managing an Indigo Digital Press
- From: "Broudy, David" <email@hidden>
- Date: Wed, 6 Mar 2002 10:59:55 -0600
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-----Original Message-----
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From: Shiloh Burton [mailto:email@hidden]
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Sent: Tuesday, March 05, 2002 4:53 PM
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To: email@hidden
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Cc: email@hidden
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Subject: Color Managing an Indigo Digital Press
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Hello again.
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I have a few questions about the Indigo Digital Press, with
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the Turbo
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Stream V 2.2 RIP.
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First, is this an ink or toner device?
maybe.
"ElectroInk" is a very fine (finer than dry) toner suspended in a light
hydrocarbon carrier (Indigo imaging oil). electrophotographically it behaves
like toner and the Indy uses the same basic bits as any other
electrophotographic engine, and has the visual repro qualities of ink. the
petro carrier is heat-evaporated on the blanket, leaving a polymerized ink
film that is sort of peeled on to the paper.
that is, if I remember rightly.
the toner-in-oil technology is not dissimilar from the old RCA Electrofax
process. if you remember that some photocopies in the early 70s were
awful-smelling things on chalky, unpleasant-to-handle paper, that was
Electrofax. the carrier was basically kerosene/Diesel oil. Indy prints don't
smell; the press area can get a little stinky if the ventilation is poor.
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Secondly, is there a scientific way (that is less time
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consuming than tweak,
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evaluate, tweak, evaluate) to go about color managing the LUT's with
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curve-based adjustments, despite the fact that the RIP does
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not accept ICC
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profiles? There just has to be a methodical means of doing
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curve-based
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color management!
I don't recall offhand if the built-in LUTs can be edited or duplicated then
edited. you can of course adjust curves on a per-job basis in the Job
editor. the default LUTs are intended to build in x amount of dot gain, as
the press doesn't have any (or much), for images that have been separated
for, say, SWOP. one of these LUTs has zero dot gain which would be the one
you want to use for the basis of an icc workkflow in front of the press.
there's nothing stopping you from using something like Gretag-MacBeth's
iQueue before the press.
--
David Broudy
Jostens R&D
11300 Rupp Drive
Burnsville, MN 55337
952.882.3617
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