For me it seems that the dot size is as with 300 dpi, but the printer
prints interlaced. For 600x300 dpi it moves the printhead by only half a
dot width between printing two dots. For 600x600 dpi it sweeps over one
line twice, moving the paper by half a dot height between the two
sweeps. This leads to a rather high intensity for 600x600 dpi. So it is
recommanded to use the "CUPS + GIMP-Print v4.0" driver and adjust the
colours with "calibrate-gimpprint". If you want to use the result of my
calibration, enter
lpoptions -P <your printer> -o
profile=750,1400,1000,0,0,-150,1000,0,278,-131,1333
Till
Vadim Plessky wrote:
>
> Re: CRET II (and PhotoRET II)
> HP 810/812/840/842/895C (as well as 890C, 720c, 715c) be definition have
> 300x300 dpi in Color and 600x600 dpi in Black.
> It's printhead, you can't change it.
