Re: Proofing Workflow for ProfilerPro -> Quark -> 2200
Re: Proofing Workflow for ProfilerPro -> Quark -> 2200
- Subject: Re: Proofing Workflow for ProfilerPro -> Quark -> 2200
- From: email@hidden
- Date: Fri, 14 Feb 2003 08:34:46 EST
In a message dated 2/13/03 5:24:42 PM, email@hidden writes:
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We've just gotten an Epson 2200 and the new Epson Stylus RIP for 2200 which
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we will be using to proof pages which will ultimately be sent to press at
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350-360 TIL. Measurements will be taken with and Eye One and profiles
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generated with ColorVision Profiler Pro. I have a few questions concerning
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this workflow.
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We had initially sent out a large test file to the printer with most of the
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graphics separated with the US Sheetfed Coated v2 profile (except for
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Duotone -> CMYK conversions which I set to a custom Heavy Black Generation
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setting), along with some reference images and a standard 125-patch CV
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Profiler Pro test chart (not the Eye One configuration; it was before we
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got it). Separation results were quite good and predictable, so I'm not at
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all sure that developing a custom separation profile is necessary.
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Then you only need to profile one of the two devices, and conveniently its
the one thats inhouse.
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I want to generate proofing profiles for output from QuarkXPress 4.1 or 5
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(the files are currently in 4.1) through the RIP.
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Thats a shame; you will find the color management (and on screen previews) in
InDesign much more user friendly!
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here are some questions:
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1) In the RIP configuration, I've chosen the US Sheetfed Coated v2 profile
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as Custom, rather than the default SWOP setting in the RIP. Yes?
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If you find that version of SWOP to be more representative, and the built in
version to offer no advantages, then yes. If the RIP does not have flexible
cross device emulation, then the canned SWOP may be the best way to get press
proofing.
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2) It would seem that the best place to supply a proofing profile would be
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in the Calibration field of the Color Management setup of the RIP, which is
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currently a null value. Or should I instead develop a profile that would
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substitute for the US Sheetfed Coated v2 profile, and leave the Calibration
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field undefined?
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You need to cross emulate the press to the proofer; this can't substitute for
your press profile, it needs to modify it. Typically (for Quark) the files
are already in PressCMYK, are defined as such, and are then converted to
ProoferCMYK to emulate the press on the proofer.
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3) My hunch on a profile-building procedure is to:
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* Generate RGB patch charts with Profiler Pro, convert them to CMYK using
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the US Sheetfed Coated v2 profile in Photoshop (rather than generating a
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CMYK chart from Profiler Pro).
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Absolutely not! There is no reference to SWOP in the Proofer profile, its the
interaction of a pure Proofer profile with a pure Press profile that
generates your emulated results. Forget SWOP or any other press standard
entirely, and profile the proofer as itself only. Set the appropriate CMYK
settings for the proofer (not the press!) in the locations described in the
ProfilerPRO CMYK UserGuide Section, then the target will be properly defined.
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* Output the chart placed in Quark through the RIP.
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Correct...
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In this regard, I would prefer to have Quark color management enabled, but
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Color Correction disabled.
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You really should read the relevant chapters in Real World Color
Management...
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This SEEMS to produce the same output as if Quark color management were
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disabled, but with better on-screen previews. Reality check??
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Quark color management only does two things (last time I tangled with it)
simplistic CMYK conversions from RGB, and roiugh screen previews.
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* In measuring the charts with the Eye One, I assume that Spectral should
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be enabled in the Gretag-Macbeth Measurement Tool -- correct?
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You read the charts with Measure Tool (again, this is all covered in the user
guide), and use its oddly formatted output in ProfilerPRO.
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* Once the new profiles have been built for this flow -- OR FEEL FREE TO
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SUGGEST A WISER ONE -- into which field mentioned in #2 would it be input?
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I'd be willing to bet the manual for your RIP explains how to use it with a
device profile, certainly in conjunction with its internal SWOP proofing, and
ideally with an external press profile.
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Any addition comments, suggestions, and/or warnings are welcome. Thanks in
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advance.
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At the risk of sounding repetitious: read the manuals...
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C David Tobie
Design Cooperative
email@hidden
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