Hi all, I am experimenting with the different black generation options and I noticed something that is confusing me. If I run xicclu -g -fb -ir SC_paper_bas.ICC (the profile is available here http://www.colormanagement.org/en/isoprofile.html#SC_paper_bas) It seems I get the curves from the perceptual intent rather than the relative... See the attached image. I also found an old thread where the same profile was used and the xicclu result was different ...here is a screenshot of "xicclu -g -fb -ir SC_paper_bas.ICC": <http://digitalproof.info/argyll/black_gen/xicclu_-g_-fb_-ir_SC_paper_bas.pn g> Thanks for your help.