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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