Roger Breton wrote:
Is it a function of Argyllcms to create this "effect"?
Hi Roger, there is nothing user accessible to change the choice of black point in CMYK profile creation (no-one has ever asked me for such a thing). There are a couple of programmatic choices, my original one being to pick a black that had the same hue as K only, but at some prompting by users, I switched to picking a black that has a consistent hue with white. In either case, there can be a slight compromising of the the hue direction (0.5 DE) against minimum L*, and those values can be changed programmatically. I don't seem to have got Martin Orpen's post you attached. Using collink -G creates a device link from the output profiles A2B table, so it re-generates the profile inversion and black generation. There is a similar (but much less sophisticated and less debugged program) <http://www.argyllcms.com/doc/revfix.html> that re-generates a an ICC profiles B2A colorimetric table, allowing re-setting of the black generation and ink limits. Graeme Gill.