Just to update this thread:
Paul sent me some great targets yesterday and I was able to measure and do luminance matches with PPEv2 (a hidden but important feature of PPEv2). Luminance can vary from head to head and printer to printer (or channel to channel!). So this is why PPEv2 is important. Also, because he has so many prints out of the P400 with slightly darker-than-linear shadows and because the P9000 is generally slightly light, it’s useful to do a luminance match calibration so he does not need to re-edit his large print files from his small print files (too much work!).
P400 linearity:
Luminance-match showing P9000 too light (red) and target luminance values of P400 (green):
I’ve gone and done luminance match calibration to the P400 here (for show printing):
Px-Hahn-PhotoRag-Neutral-P4Match.quad (9.1 KB)
Px-Hahn-PhotoRag-Warm-P4Match.quad (7.5 KB)
Px-Hahn-PhotoRag-Cool-P4Match.quad (7.5 KB)
And here is Linearized P9000 curves (these will print slightly more open than P400 in shadows but will be a linear base-line for all future printing of new work).
Px-Hahn-PhotoRag-Neutral-Lin.quad (9.2 KB)
Px-Hahn-PhotoRag-Cool-Lin.quad (7.5 KB)
Px-Hahn-PhotoRag-Warm-Lin.quad (7.5 KB)
Measurements:
Paul_Warm_P9000.txt (27.6 KB)
Paul_Cool_P9000.txt (28.4 KB)
Paul_Warm_P400.txt (27.4 KB)
Paul_Cool_P400.txt (28.2 KB)