On Fri, Dec 11, 2009 at 6:57 PM, Oliver Heins <o...@sopos.org> wrote:
> But shouldn't the same effect be seen with other colors than black then,
> too? And it only happens with black, and I think it happens even when
> you do it within a cmyk-only document:
>
> Can you test the following? My Acrobat is on a machine without net, and
> my usb stick broke within the experiments.
>
> Best regards,
> olli
>
> \setupcolors[state=start, cmyk=yes, rgb=no]
>
> \starttext
>
> {\bfb\setstrut
> \startoverprint
> \framed
> [background=color,backgroundcolor=magenta,
> foregroundcolor=yellow,align={lohi,middle},
> frame=off,width=3.5cm,height=3cm]
> {overprint\\\property[knockout]{knockout}}%
> \stopoverprint
> \framed
> [background=color,backgroundcolor=magenta,
> foregroundcolor=yellow,align={lohi,middle},
> frame=off,width=3.5cm,height=3cm]
> {knockout\\\property[overprint]{overprint}}}%
>
> {\bfb\setstrut
> \startoverprint
> \framed
> [background=color,backgroundcolor=magenta,
> foregroundcolor=black,align={lohi,middle},
> frame=off,width=3.5cm,height=3cm]
> {overprint\\\property[knockout]{knockout}}%
> \stopoverprint
> \framed
> [background=color,backgroundcolor=magenta,
> foregroundcolor=black,align={lohi,middle},
> frame=off,width=3.5cm,height=3cm]
> {knockout\\\property[overprint]{overprint}}}%
>
> \stoptext
>
I have found this
http://pages.cs.wisc.edu/~ghost/doc/cvs/Use.htm#SPOT
--
luigi
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