Re: Is there such thing as a wide gamut CMYK workspace?
Re: Is there such thing as a wide gamut CMYK workspace?
- Subject: Re: Is there such thing as a wide gamut CMYK workspace?
- From: email@hidden
- Date: Sun, 10 Feb 2002 06:35:39 EST
In a message dated 2/9/02 2:29:01 PM, email@hidden writes:
<< At 11:07 PM +0100 2/9/02, Paul Schilliger wrote:
>
Just for the sake of curiosity or for the anecdote, I am curious to
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know if there is a wide gamut profile for CMYK. I
>
had been told that scanning in that space gives a better control
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over black for Lambda output.
>
>
Paul Schilliger
>
email@hidden
>
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Paul,
>
While it would certainly be possible to create a synthetic wide-gamut
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CMYK space, the Lambda is a true RGB device, so any additional
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control the black plate seemed to offer would be entirely illusory...
>
Bruce
--
email@hidden
_______________________________________________ >>
Paul,
A good, typical Lambda profile will convert a common CMYK file to the wider
gammut which the Lambda requires. The ideal of course, is scan RGB, because
when you convert that CMYK file to the wider gammut required by the Lambda,
the colors do get synthesized as Bruce mentioned. It's amazing how this
profile sometimes repairs severely banded CMYK files though.
As for "better control over black" this is probably suggested by someone more
experienced in color-correcting CMYK than they are at RGB files. That is fine
but they should really soft-proof thru the Lambda profile to see where the
surprizes might be...
...which brings us back to gammut. The Lambda (and practically anything
printing on conventional photo process material) results in notoriously small
gammut. Yes, the Lambda, Lightjet, etc. is an RGB device but the paper &
duratrans type film is CMY, smaller in gammut than typical CMYK. An easy test
is to compare a reflective IT/8 target to a process coated Pantone swatch
book. You will find many swatches are brighter than the photo paper target. A
backlit duratrans film material is certainly brighter than reflective and
that helps those display prints look great but still small in gammut when
compared to an original Ektachrome or Fujichrome photograph.
So, your common CMYK file is fine, 'cause it's only goin' to lowly CMY.
-Stephen Ray
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