Re: Colorsync-users Digest, Vol 5, Issue 135
Re: Colorsync-users Digest, Vol 5, Issue 135
- Subject: Re: Colorsync-users Digest, Vol 5, Issue 135
- From: Doug Landon <email@hidden>
- Date: Thu, 24 Apr 2008 18:03:00 -0400
On Apr 23, 2008, at 3:03 PM, Todd asked:
At least the ISO publishes their tolerances. I am beginning to think I
am going crazy, because I cannot find published tolerances for GRACoL
or SWOP anywhere. I must be crazy, right? In "IDEAlliance 2007
Specifications and Guidelines" there are SWOP & GRACoL Print
Characterization charts which state "DEab of 5 or less for all colors"
but that is all I have ever been able to find. What about paper color,
average DE, Max DE, etc.? Anybody know where this info is published?
http://www.swop.org/certification/PROOFING CERTIFICATION PROCESS_v12.pdf
5. Five (5) numeric criteria must be met in order for a system to be
deemed to have passed
certification and to be labeled as “Certified.”
• If the difference between the characterization data set and the
IT8/7.4 target is an
average delta E ≤1.5 for all patches and a maximum delta E ≤6.0 for
at least 95% of
all patches.
• If the solid patches cyan, magenta, yellow, red green and blue on
the IT/7.4 are
delta E ≤5.0 from the characterization data set.
• If the difference between the characterization data set and patches
on the IT8/7.4
target has white point of a delta L +-2.0, a delta a +-1.0 and a delta
b +-2.0
(excluding florescence).
• If the difference between the 50/40/40 gray balance target and the
characterization
data set has a delta E ≤1.5
• If the difference for each patch in the Ugra/FOGRA Media Wedge CMYK-
EPS
V2.0x and the ADS Proofing Certification Strip between Page 1 of 2 and
Page 2 of
2 (or Page 1 of 3, Page 2 of 3, and Page 3 of 3 if using the 12x17
pages) of the form
is delta E ≤1.5.
--
Doug Landon,
email@hidden
I
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