QTR-Quadtone RIP

I posted last week about the problem of QTR drenching Permajet 
Museum Classic paper in ink (using an Epson 2100/2200, Epson inks and 
the Eboni matte black ink) and asked what might be going wrong. Well, 
for whatever reason, I printed out a step wedge in QTR yesterday and it 
came out really well. I don't know what I was doing wrong but it must 
have been something!

I don't have a curve for Permajet so I used the Entrada and Museum 
Bright ones and got lovely step wedges covering sepia tones through to 
cold tones. Even though these curves are not designed for the Permajet 
paper, there are no annoying colour shifts. The results are, as far as I 
can see, the same regardless of whether I use the Entrade or Museum 
Bright curves-which is to say very good.

There is still some metamarism, though. The sepia toned step wedge 
turns slightly olive-toned in daylight and the warm toned prints turn 
slightly cooler. The results are still the best I've ever had using full 
colour inks to print black and white.

However, and this is probably heresy, but I still prefer the results I get 
from black only printing using the Eboni matte black ink. Yes, close up 
you can see the ink droplets but at normal viewing distances they aren't 
apparent. The BO prints just look brighter and more attractive when 
compared with the QTR prints. 

Nevertheless, I'm really pleased that I've managed to get the QTR 
system working and will definitely use it for those subjects that benefit 
from the smoother tones it produces. If, by any chance, anyone has a 
curve for the Permajet paper, I'd love to try it to see how much 
difference it makes.

Bruce