Re: Making SWOP TR001 compliant proofs
Re: Making SWOP TR001 compliant proofs
- Subject: Re: Making SWOP TR001 compliant proofs
- From: "Roberto Michelena" <email@hidden>
- Date: Wed, 24 May 2006 08:58:54 -0500
So it's possible for two vendors to submit a proof to a customer with each
claiming that their proof is SWOP compliant, although each of the proofs may
be significantly different visually?
absolutely! specially given the chaotic situation of SWOP (meaning
SWOP, not TR001) proofing everyone has just described:
- no reference sheets available anymore
- compliance dictated by visual judgment of three (variable) people in
whatever mood they are on the evaluation day
So then it seems that the only true measuring stick, for now, is TR001.
Instead of just proofing to "SWOP standards", in a scenario where two
vendor's proofs need to match as close as possible for a single client, they
should instead be proofing to the TR001 standard. Does that seem reasonable?
Totally; regardless of whether TR001 represents a good press run and
how well does it represent SWOP or not, it's a single dataset
(profile) to be matched. So two systems accurately calibrated to it,
would produce proofs that when seen on a D50-ish viewing booth should
reasonably match.
Then following that logic, I would need to color manage the output to my
Finalproof in order to achive a TR001 match. Simply adjusting the device
based on the ADS would not be sufficent.
So it seems. Not having seen the ADS I can't know for sure, sometimes
the ADS includes relevant profiles and ICC calibration procedures, in
which case you're good to go. But I'd be surprised to see an ADS for a
halftone pigment-transfer (or laminate) proofing device take that
route.
Some caveats:
1) simulating paper color on a halftone device is probably less than
ideal, you'd be better off looking for a substrate with the same (not
exact, but in tolerance) color of the reference (Lab color, that is).
2) you might want preservation of the black channel, otherwise what's
the purpose of halftone proofing.... well, really, if you'll be using
any kind of color transformation what's the purpose of laminate
halftone proofing, but that's another discussion. So you need your
front end to specifically support link profiles, or support black
preservation via its CMM (effectively creating such a device link
profile on the fly).
3) maybe, if your FinalProof primaries do not match TR001, you'll have
to choose between losing accuracy (by keeping them clean, again device
link profiles) or having them 'matched' by contaminating the colors
(which I'm sure your customer will point out inmediatly as an error).
4) if your front end does not support this things, you might want to
get a pre-processor for the color management, such as Oris
Pressmatcher, Alwan ColorHub, GMG FileOut, Gretag iQueue, etc.
best regards,
-- Roberto Michelena
Infinitek
Lima, Peru
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