Re: multichannel profiles
Re: multichannel profiles
- Subject: Re: multichannel profiles
- From: "joe borne" <email@hidden>
- Date: Thu, 16 Nov 2000 17:14:49 -0500
Phil Green wrote:
>
The main weakness of computing n-colour separations from CMYK is that
>
you've already compressed the gamut to that of the CMYK media. When you
>
expand the gamut by adding extra colorants, you're then applying the
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gamut increase uniformly, instead of selectively to the colours of the
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original that require it. If you had a mapping directly from a CIE
>
colour to the n-ink set, you could get a better match to the original.
>
>
However, you could also achieve this by working with a reference
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large-gamut CMYK space, thus avoiding the complexity of the CIE->n-ink
>
transform.
I am unsure why anyone would try to go to a 6 or 7 color device with a CMYK
original (even a large gamut one). As Phil says above your just pushing the
colors out uniformly, in essence making them up. A better method would be to
start with a file defined in a large RGB or Lab space. The results you would
get from this would be far superior.
--
Joe Borne
Color & Graphic Technology Consultant
(859) 282-0393
-- "The worst thing to do is nothing" --