Re: U.S. Web Coated (SWOP) v2 always produces blues that shift?
Re: U.S. Web Coated (SWOP) v2 always produces blues that shift?
- Subject: Re: U.S. Web Coated (SWOP) v2 always produces blues that shift?
- From: Chris Cox <email@hidden>
- Date: Thu, 28 Jun 2007 15:21:41 -0700
- Thread-topic: U.S. Web Coated (SWOP) v2 always produces blues that shift?
Andrew;
That doesn't match my experience, either.
I would ask for some clarification: like is he using the Classic color
engine at any point (some people seem to think that the Classic engine
modifies profiles instead of starting from scratch and using a really
obsolete, crappy engine from 1993 -- I really have no idea where they get
this stuff....)
Chris
>
> Message: 1
> Date: Wed, 27 Jun 2007 14:31:44 -0600
> From: Andrew Rodney <email@hidden>
> Subject: U.S. Web Coated (SWOP) v2 always produces blues that shift?
> To: "email@hidden"
> <email@hidden>
> Message-ID: <C2A82550.3FCF4%email@hidden>
> Content-Type: text/plain; charset="ISO-8859-1"
>
> 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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