On Fri, Dec 11, 2009 at 6:57 PM, Oliver Heins
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