Hi Roger, there are some reasons that come to my mind: 1) The profiles do not represent the actual printer status anymore (or never did) - printer(s) changed after having done the measurements - measurement errors - inaccurate sampling of the individual printers’ non-linearities during characterization 2) Nozzle issues (which is basically another reason for 1) :-) 3) Out of gamut colours (unlikely with the combination you mention) Did you do a simulation of the result without printing? Is the dE-distribution similar for both printers? Just an idea to start digging into it. Best regards Claas
Am 26.09.2019 um 15:57 schrieb Roger Breton via colorsync-users <colorsync-users@lists.apple.com>:
Hi everyone,
I'm working on profiling two different Epson printers, a 7800 and a 7890.
Even though both printers are using the same, exact substrate, is it to be expected that there would be some "slight (but visible) differences" between the two printers? (I know I can't show you the prints.)
I convert from GRACol2006 to the 7800 and from GRACoL2006 to the 7890, using absolute colorimetry in both cases. Same conversion, same substrate, the only difference is the two printers.
In your opinion, what could account for the slight differences I observe? Is it possible (that's my best take) that the difference in the generation of inks used on both of these printers could account for the slight differences I observe?
Best / Roger Breton
www.graxx.ca
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