[NTG-context] Embedding of ICC profiles and preflight

Peter Rolf indiego at gmx.net
Fri Sep 2 10:33:41 CEST 2011


Am 02.09.2011 09:12, schrieb Honza Hejzl:
> So, it is interesting and more complicated. The exact part:
> 
> \setupbackend
>    [format=PDF/X-1a:2001,
>     intent=Coated FOGRA39 (ISO 12647-2:2004),
>     option=always,% for a much bigger document :-)
>    ]
> 
> … seems to work on my Debian standalone ConTeXt installation (ok, I will
> test it again but it objected nothing (about ICC not embedded) in
> yesteday in Acrobat's preflight) but on my Win XP standalone one it
> doesn't work. I have the profiles in the same directories, of course. On
> Win it can't eat the comma, on Debian it can.
> 
> Although the advice:
> 
> \definecolor[cmykblack][k=1]
> \setupcolors[rgb=no,cmyk=yes,intent=overprint,textcolor=cmykblack]
>

I just tested it and I also get DeviceGray here. The solution is to
define the CMYK black with all of its components. Otherwise it's reduced
to DeviceGray.

\definecolor[cmykblack][c=0,m=0,y=0,k=1]

> … seems very logical, it doesn't work, preflight still sees the text
> like a greyscale.
> 
> Thanks, Honza
> 
> 
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