For my class, because I don't have enough DTP41s and iCColor and EyeOnePros for everyone (25 students), I'm contemplating creating output profile based on as little number of patches as possible. To simplify access to the instruments, the students will use ColorPort (which the lab technician accepted installing on all stations without too much trouble) to measure the printed targets in. OK. So my question about logo2cgats is this : suppose I use IT8.7/3 Basic (only 182 patches), when importing the measurement file into argyll's ti3 format, will I still be able to create an ICC profile through "profile"? Or is there a minimum? I remember once creating an ICC profile with argyll based on as little as 60 patches. I'm going to test this capability while I wait for your replies -- if anyone's interested or care to express an opinion. Roger Breton