The trouble with recipes like this is that they're trial and error and you can burn through a bit of paper and ink testing them out. I linearised each of the four component curves first, so I can mix them in any combination and get linear (predictable) results for tone, but it's hard to soft-proof the toning mix. I did construct a layered TIFF in Photoshop that enables me to roughly simulate it, but rough is the operative term. Hence I was interested to know if others had developed alternative mixes.
One thing that surprised me in this process was the need to use so much sepia to get the look I want (which means more of that dreaded yellow ink). The blacks are naturally warm, and the QTR warm curves just use the three black inks without any toners, but the QTR warm curves are not warm enough in the shadows for a split-tone look, IMHO. Perhaps they may be on gloss. I will test that.
---In QuadtoneRIP@yahoogroups.com, <norm@...> wrote :
Tried your formula with the new Red River Palo Duro SoftGloss Rag. Like the look a lot.