Here the results of my question:
I asked my print-service, if the pdf I generated with the
code (look at the end of this email), is ok.
The text in the second frame should be overprinted.
The answer of the printer:
in the preflight he can see the overprinting,
in the print-preview he can't.
He was astonished - because he never had the difference
between print-preview and preflight before.
He is using Adobe Acrobat 10.
Hope this information helps others to be cautious -
an maybe someone can tell what's to do.
Regards
Jannis
\setupcolors[state=start,rgb=no,cmyk=yes]
\definecolor[myc] [c=.40, m=.10, y=.50, k=0]
\starttext
\framed[%
width=80mm,height=50mm,
background=color,
backgroundcolor=myc,
]
{1 Overprinted or not?}
\blank[big]
\framed[%
width=80mm,height=50mm,
background=color,
backgroundcolor=myc,
]
{\startcolorintent[overprint]2 Overprinted or not?\stopcolorintent}
\blank[big]
\framed[%
width=80mm,height=50mm,
background=color,
backgroundcolor=myc,
]
{\startcolorintent[knockout]3 Overprinted or not?\stopcolorintent}
\stoptext
Regards
Jannis
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