Good quality postscript colour printing

[Jose Gomez-Dans]

Hi,
I have produced a number of very sexy looking colour plots in
PostScript (using GMT). On the screen, the colours look really crisp
and nice, but when I print them to a Xerox 7300 colour printer
(drivers downloaded from the Xerox site), the colours appear dull and
darkish. Are there any settings I can tweak to improve the quality of
the output?

Cheers!
Jose