Re: Supplied RGB - SWOP is not TR001
Re: Supplied RGB - SWOP is not TR001
- Subject: Re: Supplied RGB - SWOP is not TR001
- From: Roger Breton <email@hidden>
- Date: Thu, 27 May 2004 12:17:13 -0400
Rich, I forgot to mention. Please don't take the following as a direct
contradiction of your opinion which I respect very much, btw, but the
many times I spoke to the SWOP people and all the places I've read
about SWOP, the recurring theme is that what SWOP mandates is for
printers to match a SWOP proof. However they arrive at it SWOP won't
dictate that. It's up to the printer to match a SWOP proof. So, yes,
there are many, many variables but they rest with the printer not with
SWOP, as you aptly point out.
Can you expand what you mean by SWOP conformance? Maybe we're both
sayin the same thing?
Roger Breton
On 27-May-04, at 10:17 AM, Rich Apollo wrote:
On May 26, 2004, at 6:18 PM, email@hidden
wrote:
Although there is supposed to be a SWOP standard - I see no
evidence of that in the reproduced pages. Colors and tonalities vary
wildly
SWOP is not necessarily TR001. SWOP is a description of a printing
condition based on dot gain, solid ink density, line screen, paper,
print contrast, etc. It is not a colorimetric characterization of that
printing condition. There are many variables that can be altered while
still keeping you within SWOP conformance.
All these prints you refer to - were they on the same paper? Did they
use the same ink, blankets, coating? Heck, for that matter, were the
presses running at the same speed? Were the chillers set to the same
temperatures? Were the trap numbers the same? Was the web tension the
same? Was there an expicit arrangement between the printers involved
that they would conform to a colorimetric standard? Which one? To what
tolerances? Were the separations generated in the same manner? Did
each printer use the same UCR/GCR/black generation settings? Did the
printed pieces match the proofs that were available press-side? Did
the printers all use the same screening technology? Were the
signatures laid out the same at each location?
Point is any or all of those printers may have been within SWOP
conformance.
Rich Apollo
Priority Litho
314-344-1144
email@hidden
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