[Scribus] Gray values on different printers

[Eilert]

Just wondering wether there is a chance to "calibrate" the different 
printers' output here.

When I work with e. g. Scribus here in the office, I'll use the office 
printer for test printing. When I output on the big copier, however, 
gray tones won't fit anymore (much lighter).

Could someone give me a hint where I can find something like a printed 
standard gray so I can compare and adjust the two printers a bit? It 
doesn't have to be professional, just want that the two come nearer to 
each other.

Just adjusting one of them won't do, I think, because I might be 
misadjusting the grays completely then. What I need is a good sample to 
rely on.

Rolf