2008/8/10 Graeme Gill> > Nothing wrong with this. The white calibration is just as effective > as anything else in blocking light to the measurement head. Right, I just didn't realize that. Sorry, I've no idea what basiccolor does, all I know is that (as best I > can ascertain) the Argyll driver agrees with the X-Rite/Gretag driver as > to the i1pro emissive calibration. I'd need a compelling reason > to second guess what's in the instrument EEProm. > To me a difference of 45 cd/m^2 between instruments is too big, Is there anything I could try to get more info on the instruments or the operation? Martin Weberg