[cairo] Spot colors (and CMYK)

Kai-Uwe Behrmann ku.b at gmx.de
Sat Feb 20 16:38:28 PST 2010

Am 20.02.10, 22:26 +0100 schrieb ecir hana:
> On Sat, Feb 20, 2010 at 9:17 PM, Chris Murphy <lists at colorremedies.com> wrote:
>> On Feb 20, 2010, at 4:19 AM, ecir hana wrote:
>> Both RGB and CMYK and spot values are meaningless without being tagged. You may specify CMYK values directly, rather than needing a CMS to produce them, however those CMYK values should be tagged with a profile so that their color meaning is usable downstream: for display, for proofing, and for preflight purposes to confirm the proper printing conditions are applied.
> Ok, lets see what would happen with tagged and untagged workflows:
> Tagged - I have CMYK SWOP 0, 0, 0, 100. If I print on coated paper in
> US, no big deal. If I print in Europe on uncoated paper, they just
> convert from SWOP to FOGRA (?). Now, how does my CMYK look like?
> Definitely not 0, 0, 0, 100 - there would be no zeros anymore and no
> 100, i.e. no solid, just 4 rasters - *this* is something I don't want.
> But then you say, that's because you didn't use device link - sure
> thing, but where can I get it?

lcms and I thought as well ArgyllCMS have options for.

kind regards
Kai-Uwe Behrmann
developing for colour management 
www.behrmann.name + www.oyranos.org

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