QTR-Quadtone RIP

>... To get a neutral print, it is necessary to use non-black inks. 
> This is because the black inks are not neutral.

Not all carbon is always warm.  A very neutral print can be made with Eboni
MK.  See http://www.paulroark.com/BW-Info/R1800-Glossy.pdf and the print
tone graph for the Ilford Gold Fibre when printed with Eboni MK and sprayed
with Premier Art Print Shield.  I don't like having to spray prints, but the
result was about as neutral a print as is possible, with no color inks and
no color artifacts.

Carl and I have been looking at a workflow that uses Gloss Optimizer instead
of Print Shield.  It's not quite as neutral, but close.  See
http://www.paulroark.com/BW-Info/3MK-Glossy.pdf 

Unfortunately, even Eboni when diluted prints warm on glossy papers.  So
we'll be experimenting with the 1800 and the UT-RC blended inks next to see
how these do when more smoothness is required than is possible than the 100%
Eboni workflow can deliver.

Paul
www.PaulRoark.com