CMYK profiles are indeed a different thing, but I was checking RGB printer profiles. Stefan
2 jul 2015 kl. 02:54 skrev Graeme Gill <graeme2@argyllcms.com>:
Stefan Ohlsson wrote:
But I noticed something odd when I followed your advice. I expected to get the same result if I used perceptual rendering or if I used relative colorimetric with black point compensation. But no, at least on the 4 profiles that I tested.
The black point of a CMYK device is something of an arbitrary choice. It depends on the maximum ink you want to use as well as any black chromaticity target, and it may also depend on how gamut clipping is handled, if the chromaticity target isn't achievable. And then if you are depending on the B2A table to look it up, it may not be represented terribly accurately in the profile compared to a black point tag.