In January, I will begin to produce a new set of curves for PT/PD that are linear to UV - using a UV densitometer rather than the visible light densitometer that I used to make the Meth 3 curves. If you followed my blog when I was designing the system - there is a process I created in which I did linearize a curve directly to the silver paper - and the Piezography profiler forced the Ilford Multigrade to print with rather long tone associated with Piezography - and it just did not look like a silver print with its characteristic S curve. So, I abandoned that although I left the curve out there in the universe if anyone else wants to use it. I did not envision that silver printers would want to lengthen the tone of silver. Blaspheme! If I am wrong, it's worth a try using Ilford Fiber Base. You could probably rearrange the curve to match your Piezo Dig Neg current inks setup.
For the UV system I do plan to linearize to a range of PT/PD chemistries. My thought being that it would help some without much PT/PD experience to enjoy an out of the box experience with making digital negatives for PT/PD. Also Pt/PD is more linear than silver so this type of curves generation would be welcome by UV sensitive printmakers. I have seen some extraordinary good platinum prints using the Meth 3 curve - but they required quite a bit of Photoshop curve correction to compensate for UV. At the Santa Fe workshops we make PT/PD prints that are immediately satisfying with a base PS curve we provide based on the work of David Chow for whom I designed the system. From first using that curve, we expect the users to bend the system to their own will. The PS curve making is the bit that I envision eliminating with the UV generation of curves.
My plan is to release this for the EPSON 1430 (still available). The 13" wide film is not enormous but the printers are inexpensive enough. Also, I never made a dig neg system for this printer. At the same time I will do the visible light curves. We know Piezo inks can trap UV - it's just a matter of how the ink is linearized.
We are also releasing a new multi-curve system based on the X880 platform (double quad) and the X900 platform (triple quad). These will allow selecting multiple curves to blend and split tone in QTR. This should release for xMas and I may follow up with dig neg for it sometime in 2015.
Welcome any suggestions, etc here or off list.
Jon Cone
Piezography