Am Dienstag, 23. September 2008 10:36:18 schrieb Dotan Cohen:
> My printer has a stuck blue nozzle and I am trying to clean it. Of the
> blue, yellow, red, and black cartridges, I want to only print from the
> blue. I tried to configure a blue-255 colour and the rest 0, however
> the printed image still uses a bit from the red cartridge as the
> choice of colours differ from those in Gimp. What colour could I
> configure, that would translate to blue only from the printer?

Printers are normally CMYK, not RGB. That is why 0000ff will also utilize the 
other cartridges of the printer, not only cyan.
You will therefore have to select 100% C from CMYK colourspace in order to 
only print from the C cartridge - which is a bit awkward in Gimp, since the 
program has no direct CMYK support. Nevertheless, you can do so with the 
colour selector (get to the printer colour selection mode for CMYK colours).
The colour will be translated to RGB 00ffff...



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