I am a little surprised by that. Certainly not my experience with Piezography, and I'd have thought that the same principle would apply to Eboni. It may reflect differences in the linearity between those two particular printers. For Piezography you have to edit the 38x0 quad files so that the ink shades are listed in the correct sequence in order to be able to use them in the 1900. If you're using the 3800 curve on the 1900 (if I understand you correctly) then I assume you've done something similar, because if the inks where in the wrong order you'd presumably be getting some pretty wild results.
Re droplet size, I don't think that's a reliable guide. The 14x0 and the 1900/2000 both have 1.5 minimum droplet sizes, the 2880 has 3.0, the 3000 has 2.0 and the 38x0 has 3.5. On that basis you'd be able to share curves between the 1430 and 1900 but nothing else, whereas the exact opposite is the case. Perhaps more relevant is the number of nozzles, with the 14x0 having 90 per channel and everything else has 180. And the 1430 was designed as a dye printer, so you'd expect some difference to the pigment printers.
---In DigitalBlackandWhiteThePrint@yahoogroups.com, <phlg@...> wrote :
Re droplet size, I don't think that's a reliable guide. The 14x0 and the 1900/2000 both have 1.5 minimum droplet sizes, the 2880 has 3.0, the 3000 has 2.0 and the 38x0 has 3.5. On that basis you'd be able to share curves between the 1430 and 1900 but nothing else, whereas the exact opposite is the case. Perhaps more relevant is the number of nozzles, with the 14x0 having 90 per channel and everything else has 180. And the 1430 was designed as a dye printer, so you'd expect some difference to the pigment printers.
---In DigitalBlackandWhiteThePrint@yahoogroups.com, <phlg@...> wrote :
Brian, on my side, when using the same curve, the R1900 produces lighter result than the 3800. The LAB L values given previously came from the 3800. I have just printed the same ramp with the R1900 on Epson HPN, and the better Dmax is now at 16.02. But 14.92 on the 3800.