[scribus] Strange: Printer prints low-res fonts alongside with graphics

[Rolf-Werner Eilert]

Hi folks,

Maybe someone here can point me to the right direction.

We got a new laser printer, color, a Utax P-C 3061 DN which is a Kyocera 
derivate.

Printing pages with pure text, the fonts are rendered perfectly clear. 
Printing pages with graphics and text on them, the fonts look like from 
a 1986 300dpi printer, i. e. with cut-away edges, glyphs unfinished, 
pretty ugly. When printing color elements (even straight boxes and some 
of the headlines in color, no actual pictures, just color involved), the 
effect on black fonts appears even worse.

I installed the original PPD for this printer.

Where should I try to look: in the printer options or when making the PDF?

Maybe I can find a good advice here before spending hours trying to find 
out... So, thanks for your insight!

Regards
Rolf