Hi, I just got around to installing the piezography inks (special edition) in my 3880 (had to use up the remaining color first). Everything seems to have go as expected with the install. I had yellow staining, but printed a few full sheets using the QTR calibration mode and the color for pure ink 4 and that seems to have cleared.
The few test prints I've made seem to have very dark shadows, and printing a 21step target produces a non linear output in from about 40% to 100%. Before I fixed the yellow stain it was also non linear throughout the whole range. The inks don't look like they have residual staining left, but just in case I did an additional power clean and the results look the same.
I'm printing on Epson Luster for the testing.
I use the QTR Print Tool as described in the manual.
The 21 step target is from QTR, 21step.psd.
I verified the ink order using the QTR ink pattern page. Checked with a densitometer and they seem to match the correct order in the paper curves.
Nozzle checks are correct.
Curve data read with a color monkey and using the L values.
I'm out of ideas. Is there something I'm missing?