I would like to print to PDF documents from LibreOffice Writer but with CMYK color profiles.
How can I achieve this?
According to the LibreOffice support page , printing in CMYK is not currently possible.
To my knowledge, you will need to export the pdf using a tool like pstill which does pdf conversion to either a PostScript(.ps) or EPS(.eps) format. The software is rather old; but it does run, for me, on a 12.04 machine.
There is also the Gutenprint driver that you may want to investigate. It appears to be a bit newer.
As far as the conversion process goes, I had seen a bit of a color-shift in document quality with pstill . YMMV, as my print jobs have not been color critical on Ubuntu.