Am 01.09.2011 20:42, schrieb Honza Hejzl:
> Thanks,
> 
> Just a notice – the style \startoverprint… should be probably in future
> versions too, or how to overprint two elements and how to knockout the
> next one? Is it possible? (In one file could be a lot of such cases needed.)
> 
You never know and as Wolfgang stated, it's best (and wise) to use the
latest official commands.

\startcolorintent[overprint] Overprinted text \stopcolorintent
\startcolorintent[knockout] Knockout text \stopcolorintent

The commands can also be nested.

\startcolorintent[overprint] OVERPRINT ONE TWO
\startcolorintent[knockout] KNOCKOUT THREE \stopcolorintent
OVERPRINT FOUR \stopcolorintent

> In case of \setupcolors[intent=overprint] is the problem in the fact
> that preflight says that all text is "gray object overprinted" and that
> is against the standards. I have simply one test page with one article
> of black text. Everything goes fine except the fact of non-embedded
> profile and the fact that text is considered like a gray scale object.
> 
The (stupid) preflight has problems with overprinting in combination
with grayscale. You could try to use CMYK (black) then. Something like

\definecolor[cmykblack][k=1]
\setupcolors[textcolor=cmykblack]


> In case you could try to generate one pdf with such settings I could
> test them in Acrobat.
> 
> Honza Hejzl
> 
> 
> 
> 
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