In experimenting with Richard's linearisation process, I managed to generate a curve for my 3880 with OR and GR after the valid inks. They had values of 0 in each position. The result of printing with this curve is that QTR produces very dark prints across the full range.
I know that I shouldn't get the curve wrong and that QTR has no way of posting an error but, should QTR ignore inks that aren't identified in the Quad header?
Cheers,
Jeff