QTR-Quadtone RIP

> Virtually all stepwedges are evenly spaced in K values but not 
necessarily
> even in L values.  So any CM discussion of values MUST MUST MUST 
include the
> L values
> or the profile that is being used so one can convert.
> 

Absolutely Roy. 
But as I said, MPS K7 on Innova F-Type R1800 output is a struggle to 
say the least. 
The canned profile doesn't work for me : it over-inks and a 1mm-thick 
layer of ink floats on the paper at the 2880 recommended resolution. So 
I'm left with the need to produce my own curve set. While I'm not 
competent at partionning and understanding density, I'm fairly ok with 
QTR usage.
I went for curve creations both with a standard proceeding (small 
overlaps) and a canned-curve comparable one (i.e. long overlaps). In 
both cases I also tracked any potential over-inking. I used the 
51stepwedge to get the output linearized and I got quite a good result 
till there.
21stepwedge and Create-icc gets me the profile. 
The final print is just terrible : over-dark and no shadow separation.
I only spent a couple of days on MPS and this is where I stand so more 
testing are needed, but I was expecting better at the initial stage. 
My assumption is that despite no over-inking at the dark end of the 
greyscale and fine linearization, the partitioning is not right. Now I 
don't understand the so many inks usage in the shadows in the canned 
profile and I don't know how to do that on my own.
Olivier