Digital BW, The Print

Hello IJC/OPM users,
 
I was initially very thrilled at the ability to create quad tone profiles very quickly using IJC but after printing one of my favorite image for comparision with one using the IJC profile and one using Paul Roark's curve for MIS UT-FS for EEM paper I noticed that the one using Paul's curve is significantly more brilliant.
 
It's not the the IJC/OPM image is flat, it's very nicely rendered. Smooth gradients with good details in both shadow and highlights. But measurements of darkest patches show the one printed using Paul's curve has the expected high DMax of 1.67 or somewhere about there. The one rendered by OPM yields about 1.59. This is enough to show the first one has significantly more punch when they are placed side by side.
 
Can someone explain?
 
I played with IJC to push maximum ink limit, increase the black ink setting, cut off the medium gray earlier, force maximum overlap, etc. but there are no changes. The maximum dmax remained the same.
 
Thanks,
--nick


[Non-text portions of this message have been removed]