Changing GCR/UCR in a third party ICC profile?

[adrjork]

Hi everyone. I installed the ICC profile of Blurb printer service. I’d like to change GCR/UCR in order to reduce the ink percentage of my prints.
Photoshop should edit GCR value going to Color Setting > Custom CMYK > Ink Colors, but Blurb is absent, i.e. it seems Photoshop can modify only pre-installed profiles (like SWOP), but not third party ICC profiles.

So I wonder if it’s possible to change GCR value of Blurb’s ICC in DisplayCAL?

Thanks in advance.

[Author]

Posts