U.S. Web Coated (SWOP) v2 always produces blues that shift?
U.S. Web Coated (SWOP) v2 always produces blues that shift?
- Subject: U.S. Web Coated (SWOP) v2 always produces blues that shift?
- From: Andrew Rodney <email@hidden>
- Date: Wed, 27 Jun 2007 14:31:44 -0600
- Thread-topic: U.S. Web Coated (SWOP) v2 always produces blues that shift?
Here's one quote from an industry expert who believes that the TR001
specification as reflected in the U.S. Web Coated (SWOP) v2 profile built by
Thomas Knoll in Photoshop always produces a blue shift. I was hoping some
here with experience with this process could comment. The profile he¹s
supposedly comparing is one that is based on G7 spec:
> I took a quick look at this profile and I agree that with respect to blues,
> cool neutrals, and black generation, it's considerably better than SWOP v2. I
> didn't check anything else. However, being based on machine measurements and
> an
> inaccurate colormatching formula, it *does* have the typical purple shift,
> though nothing as bad as SWOP v2. However, it's something to watch, a minor,
> manageable problem.
>
> It does, however, reemphasize how far off base the SWOP v2 profile is with
> respect to blues. The two are farther apart than can be explained by any
> normal
> press conditions--and I think most people would agree that the Coated3 profile
> is itself too purple in the blue range, persons who worship
> spectrophotemeters excepted.
>
This doesn¹t jive with my experiences although I¹m sure others have much
more experience in using this profile.
Comments?
Ideally I¹d like to put this to a test using something a bit more reliable
and empirical than simply looking at CMYK numbers from a file that someone
separated. Anyone have a proofing device or press that conforms to TR001
that would be willing to run a test?
Andrew Rodney
http://www.digitaldog.net/
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