Hi, > You can't solve Your problem with skin tones without complete process > profiling. Well, no surprise there. I tried to do that, but since the spectromether's aperture is quite wide and the cup is not flat, I'm getting bad readings because ambient is reflecting of the cup. I tried to shield the measurement area using matte boards, but.. even with spectromether mounted to a tripod it is not possible to shield it completely (I have to be able to position the instrument and the cup to get a precise reading of the chart). Any tips on how to get rid of the ambient reflections from non-flat surface? Thanks -- Martin Sivak