Datacolor User to User Support Group.

This may be of help to some people.

Last night I made a new profile for epson archival matte (enhanced 
matte?) on the epson 2100. This time I printed the 225 patch target 
with the colour density (in epson's driver dialogue) reduced by 20%. 
Otherwise it was the same as the first profile I did with 'no colour 
adjustment', 1440dpi, hi-speed unchecked. There was a startling 
difference in the target print.

Before, it was not possible to differentiate by eye, in good light, 
between A1 and B1 and between any of the patches K6 to O6 and K7 to 
O7. With the reduction in print density there was a clear visible 
difference in the patches and the resulting profile gave much better 
detail in the shadows and dark foliage areas.

It certainly pays to study your target print and optimise that before 
making a profile.