Eric,
Looking at your original images the bands look approximately 1inch apart which is the head size.
So my guess is that you are seeing the variation of the inkjets -- probably normal manufacturing tolerances.
The close bands at the top of a print are likely because the reads have to make closer passes over the paper there.
The way this is normally avoided (actually hidden) is using lots of different jets scattered seemingly randomly.
The interleaving of passes helps a lot but also using more different inks helps a lot. When you mentioned using
only one ink this suggests to me you are using lots less different jets. You've said the Epson driver is better
and its because it uses lots of different inks -- grays as well as all the colors. This gives smoother results but
may not be the inks you want. Of course this is the advantage of QTR -- you get control of the inks.
But you still have to use several inks to hide banding. I don't do negatives in general but most curve-profiles I've
seen use many inks with the same curve shape. For instance Y is ordinarily not very dense but to UV light it is
quite dense. So try adding inks -- reduce MK and increase others. You ought to have tested the different inks
for UV density previously.
Roy
