[scribus] Printing in gray

[Andreas Vox]

> -----Original Message-----
> From: Jehan Pagès [mailto:jehan.marmottard at gmail.com]
> Sent: Montag, 8. Dezember 2014 17:16
> To: scribus
> Subject: [scribus] Printing in gray
> 
> Hi,
> 
> I've been trying to print from scribus, but it will print only in gray for
some
> reason (even though all the options are clearly set for colour printing).
> I even tried print separation, but every page print in the right place but
in
> grey instead of the expected color. Would you know what is the problem?
> Note: I tried both Scribus 1.4.3 (from my Linux Mint packaging system),
and
> the dev version from svn).
> 
> As a side question, if I export a PDF in PDF/X-3 with a CMYK output intent
> profile, and using only CMYK colors, why when I print from a PDF viewer,
it
> does not correspond. As an example, I had a bit of yellow in samples which
> were supposed to be full cyan. How is that?
> Would the problem be in the PDF reader which make some translation to RGB
> perhaps? Or I don't export the PDF the right way?
> Thanks!

PDF-X/3 is a color managed format. That's why there will always be ICC
profiles used
to compute the actual ink mix. There isn't just one CMYK profile, each
device has its 
own. In theory, if you use the same CMYK profile to specify colors in
Scribus as it's
later used for printing, the CMYK channels should translate 1:1. But a pdf
viewer and
the printing system (CUPS) might interfere with that.

If you want to preserve the CMYK channels, you can use the PDF-X1a which is
available
in newer Scribus versions. You still need a printing system that passes the
CMYK channels
untranslated through to your printer.

/Andreas