QTR-Quadtone RIP

I have an Epson 2880. For starters I wanted to use QTR with Premium
Glossy Photo paper. Using the settings "optimized B&W Photo" from
Photoshop I get satisfactory results.
Following the user's guide I looked for curves for this paper but
found none. I tried then UCpk-raw-neut (both curves) and printed. The
result is not satisfactory so I thought I could try to create my own
curves...
Well I printed the InkSeparation.tif file, Ink Slider to the right(not
to the left) so as to get the value 100 and got a age with all 8 inks.
Now I'm stuck. I don't understand what I'm supposed to look for. "the
patch where it appears that all paper is covered with ink" Does this
mean the patches where one cannot distinguish the fine lines? Or where
one cannot distinguish a patch from the next? I'm using a loupe.
The problem is that it doesn't look like I understand what I am doing
at all. Some parts of the user's guide are elementary, others seem to
speak to persons with a previous knowledge (in printing techniques) I
don't possess :-(
Is there anything I can do/read?

Thank you for any help

Jorge