Re: U.S. Web Coated (SWOP) v2 using GCR or UCR?
Re: U.S. Web Coated (SWOP) v2 using GCR or UCR?
- Subject: Re: U.S. Web Coated (SWOP) v2 using GCR or UCR?
- From: Phil Cruse <email@hidden>
- Date: Wed, 5 Apr 2006 16:36:21 +0100
- Authenticated-sender:
| Matt, Roger & others I think we can assume that adjustments in PhotoShop to UCR/GCR, Dot Gain,etc. are not based on any modern ICC Profile at all (SWOP, EuroWhatever, etc.) regardless of whatever CMYK profile is assigned. Are they in fact based on ICC profiles and ICC Colour Management at all? I suspect they go back to some old prehistoric non-ICC DNA surviving in the software (Neanderthal perhaps?). Incidentally my take on GCR is that it is "extended" Under Colour Removal. Just goes more into "dirty" colours (i.e. those with a low chroma). I believe it started out in Germany in the 70's as "Unbunt Aufbau" or something. In Crosfield we used to call it "Extended UCR" before Marketing came up with "Polychromatic Colour Reduction" (PCR). As has been pointed out GCR is not related to the Black starting point but to the amount of tertiary colour replacement in dirty colours. Although most folk using it would tend to have a lower black starting point.
Just my £0.02 worth!
Phil Cruse Graphic Quality Consultancy
email@hidden www.colourphil.co.uk Re: U.S. Web Coated (SWOP) v2 using GCR or UCR?
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