Vince Lupo
Whatever
About a year ago I met a Piezography aficionado here on RFF and we exchanged prints from the same files. My peer group and I couldn't see a consistent improvement in his Piezo prints over my three-toned ones, but a number of variables weren't under control.
Kirk
BTW, the blog mentions inadequacy of Cone's tiny sample prints. I bought both sets, and IMO they're just awful: besides being too small to see, they exhibit considerable inconsistency in shadow detail; and some, with a proper viewing light, even look green. I wish some more convincing samples were available.
I've posted my thoughts in other Piezography threads, but I went through the Piezography conversion with my Epson 3880. Like you, I could not see any discernible difference in prints made with it and made with Epson OEM inks (actually, when I did 'blind' side-by-side tests with friends and my wife, they all seemed to prefer the Epson prints). I think I'm a pretty good printer and have about 35 years of printing experience (both darkroom and digital), plus I exhibit and sell my black and white work (just sold four pieces to one new collector this past week, and I have a solo show at the Leica Store in DC later this year). Personally, I'm sticking with the Epson inks, as the prints look great, are consistent, and there is the odd occasion when I need to print colour for a client (so it's nice to have that flexibility). They are often mistaken for fiber-based darkroom prints (even by those with experienced eyes). But to each their own. While I'm sure that the prints from Cone inks are indeed excellent, I personally think the prints from the OEM Epson inks look every bit as good.
BTW if you're using a 3880, one way to reduce the possibility of 'pizza wheels' is to use the 'front manual feed' mode.