[scribus] Printing in gray

[a.l.e]

hi jehan
> Hi,
>
> On Tue, Dec 9, 2014 at 8:23 AM, Rolf-Werner Eilert
> <eilert-sprachen at t-online.de> wrote:
>>> An old laser printer: HP color laserjet 2840.
>>>
>> Why do you make a CMYK instead of a standard color PDF?
> I had a problem with my printer, so I wanted to print just some
> cyan/magenta/yellow/key shapes alone to test them and see if it could
> help me diagnose; and I thought I could do so with Scribus by using
> CMYK colored rectangles. It turned out printing from the PDF generated
> from Scribus, I had some yellow in some other shapes, so I figured
> there was a problem (which I could see, since I had the printer
> problem).
> And printing from Scribus itself, I had grey levels instead of colors
> (a problem I already encountered so I usually don't print from
> Scribus, but tried again, just in case).
>
> Isn't it supposed to be possible to make a document with CMYK colors
> in Scribus and get it printed with the CMYK composition directly to
> the home printer (so if I say "Cyan only" color, I want only the cyan
> toner to be used)?
>

i'm not 100% up to date on the topic nor a color / print specialist... 
but from what i used to hear in the past, consumer printer expect to get 
RGB (and the internally convert to CMYK for printing). so, if you feed 
them with CMYK, the driver will first convert the file to RGB and let 
the printer reconvert it to CMYK.

if this is true, no, it's not possible to print cyan only on a consumer 
printer.

i'd be interested in hearing from someone more knowledgeable than i am, 
if this is still true (or even if it has never been true).

on the other side, printing in color from a linux computer is a hit and 
miss... and printing from scribus is mostly a miss (except on windows). 
IMO not worth the try, except if it by chance it just works on your 
computer / printer.
this comes from my own experience on mac and linux (plus from reading 
many experiences by other people...)

ciao
a.l.e