I have never used the Piezography setup. My experience was using and epson 3880 and the stock inks and Pictorico OHP. I was experimenting with a very calibrated workflow, with the help of Austin Community College computer,hardware equipment and my darkroom. The idea being to print a step wedge on transparency, contact print that step wedge in the darkroom looking for a perfect white and black, then use a calibration device, in my case an eye1 to adjust the image so you can get consistent results.
I was able to achieve consistent tonal values but felt that the high resolving power of silver gelatin paper showed too much of a "digital" looking image. It felt like I could see pixels, which were really the ink droplets.
With platinum palladium process this is not an issue as the papers use reduce resolution enough where you can't tell.
I was using the standard pictorico ohp clear designed for use with epson 3880s but I wonder if something like this
http://www.freestylephoto.biz/22816-Pictorico-Pro-Hi-Gloss-Inkjet-White-Film-8.5x11-20-Sheets
with it's white base might solve of my problems.
My understanding is that with standard epson inks you can take advantage of using colored inks to build in contrast on an inkjet negative that will work well with black and white media. However, I would imagine that the piezography setup could work quite well!
If so it would provide a very excellent solution where one could in theory go seamlessly from an edited image on a screen to a darkroom printed image with only the additional cost of transparency and darkroom paper. (of course considering ownership of said printer and calibration devices.)
I do not own a quality printer and usually used ACCs but I'm not a student there right now so I may invest soon. What's the cheapest model you could use with Piezography?
John