QTR-Quadtone RIP

I have my machine and QTR so they work quite well  ...  The prints on Hanamuhle Etching are very nice   ... but I noticed with the H. Photorag there is a florescence on the edge of the black tones.  I presume too much ink is causing the problem. And this is the paper I wanted to use to learn to make a profile.

I ran the Inkseperation.psd., and I got a nice band of tones for each ink. I am absolutely befuddled by what I am supposed to look for - ie "where it appears all the paper is covered with inks."  

I bought an old 7600 printer from a friend, and it has very smooth tones, In the light grays I can not see dots or lines.

In the first five inks of Cone k7 all the paper is covered with ink at 5%, and then step through gray tones all the way to 100%  ... Though the last 5% (95-100) is subtle.

K6 stops separation at 80%, and K7 black stops separation at 50%.

Any help on what I should look for?
Does it matter if I use the PSD or a Tiff?

Thanks


Michael

Using mac pro/ os10.5.7 / cs3 / epson 7600 / Cone k7