QTR-Quadtone RIP

Ernst,

Partly I understand what you mean, but I must confess not all of it. We 
seem to agree on the conceptual, theoretical framework. But as you 
explained, the bare reality brings in several subtleties. Furthermore 
we seem to have a different preference for a workflow. Yours based on 
an apparently long years B&W experience, seeking for standardization. 
Mine based on a fairly short not-completely-newbie-anymore experience, 
with a background in painting and printmaking, loving to tinker with 
pigments, paints and inks.

It's very interesting to see new paradigm developing. I'm curious to 
see where it will lead to. For the time being I'd be perfectly happy 
with the 3 curves + sliders approch that Roy suggested.

Joost