Yes, I'm aware of the Piezography Digital Negative system.
What I'm planning to do is similar to what a number of Carbon Transfer printers are doing to make their negatives, and that is to use an all-black inkset where all cartridges contain PK ink, undiluted. This allows the ink limits to be quite low so drying time (and pizza wheel marks) are reduced.
Testing by a number of respected individuals in the field show this to be a viable option. Most of them are using Epson's K3 PK drained from the 220ml cartridges, but as I'm a tight budget I was planning to try the ConeColor K3 PK ink (if it's known to adhere well to Pictorico - I had read some comments that it's not as a robust on film as Epson's ink).
Can I assume (by reading between the lines) that your Piezography DN inks are a better choice for working with Pictorico films? From a purely ink/film compatibility perspective are they a better choice than ConeColor inks?
(my thinking here is to use the Piezography Selenium shade 1 or 2 as my "black" rather than the ConeColor PK...)
Needless to say this requires building and testing a QTR curve.