I've been trying to print a PDF created with Xelatex, and the text (using opentype) is not as crystal clear as the same text printed directly from word (the edges are jagged/grainy).
Nailed the program down to xcolor package. When using xcolor to define colors and using CMYK as the color space, black defined as:
Doesn't come out as true black, and fonts become thinner as result. But changing the xcolor settings to:
Makes the problem dissapear. This was tested in Windows using texlive, Adobe Acrobat Reader and Foxit, and a HP Laserjet printer (the problem is not the printer, you can see the difference in the PDF viewer directly).