I recently upgraded my old Colorsavvy CM2C colorimeter to Eye-One spectro (without UV cut filter).
For testing purposes I took my Epson R800. This R800 was one of those devices suffering from dark prints when used with Epson's profiles. A custom profile with the CM2C took care of this and additionally the smudging that came with the original Epson profiles was very much gone.
I used the I-Match TC9.18 target (2 pages, 918 patches, measured it 3 times, checked DeltaE (in MeasureTool) and when everything was OK I averaged the measurements and created the profile with GMB Profilemaker. When evaluating the new profile I immediately noticed that smudging was back again (especially in dark hair/skin/foliage) !
Smudging was worse with rel.col. intent than with perceptual.
Next I used MonacoProfiler to create a profile (on basis of 729 patches, also measured 3 times and averaged after DeltaE was OK), and guess what, smudging was gone again.
I opened one of the problem images in ColorThink and noticed that the problem colors lie outside the printer's gamut. This explains why the smudging with rel.col. intent was worse (gamut clipping) compared to perceptual (gamut compression).
Anyone ever seen this before?