Re: Kodak Approval and ICC
Re: Kodak Approval and ICC
- Subject: Re: Kodak Approval and ICC
- From: "joe borne" <email@hidden>
- Date: Fri, 10 Nov 2000 08:19:15 -0500
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In a message dated 11/7/00 10:32:29 AM, email@hidden writes:
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>My question is, have any of you used a Kodak Approval system and
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>profiled it? Can you not build in dot gain in the profile? I was
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>surprised with Kodak's (a major player in color) attitude towards ICC
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>profiling and color management in general.
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Dot gain can (and should) be calculated as part of a profile; the question is
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whether this device and its software can handle a profile on top of their
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liniarization (or liniarizaton/dotgain) adjustments. Applied in the right
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manner it shouln't even know it was done, and simply print the corrected data
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for you.
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C. David Tobie
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Design Cooperative
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email@hidden
Of course in most profiling situations the dot gain should be part of the
profiling data. In this case though you should NOT profile!
The question is not whether the device can handle a profile overtop of the
linearization. The question is whether profiling is appropriate with this
device and the answer is a very clear and resounding NO.
The Kodak Approval was designed with one purpose in mind - to create a
digital proof that was a legitimate replacement for analog film proofing.
The Approval creates a faithful dot-for-dot representation of exactly how
the job will plot on film. When this device is employed it's primary purpose
is to allow technicians and savvy clients to actually look at dot structure,
screening, rotation, rosette and density. If you apply a profile, no matter
how perfect it is, it will invalidate the entire reason for using the
Approval in the first place.
A profile by nature disregards percentage data in favor of a remix of colors
that give a better visual representation. A profile will adjust the
percentages of color in each channel individually in order to achieve better
visual representation of a Lab value. If clients are given an Approval proof
that has had a profile applied overtop of it, they are being given a false
proof. The dots on the page will not be anywhere close to what will happen
to that data on film or plate.
As I stated in my earlier post, you should use the tools Kodak supplied to
adjust the individual channels until you get a faithful press
representation. Then make a profile, but DO NOT use that profile to adjust
the Kodak. Instead use that profile as a characterization. You give that
profile to other devices like Inkjet printers running a RIP that can do
simulations (Mach1 etc). Then those devices whose dot patterns are
irrelevant can simulate the proof that is a true press representation.
--
Joe Borne
Color Consultant
(859) 282-0393