Re: [NTG-context] Bug with overprinting in Mark II/IV?

Am 12.12.2009 16:41, schrieb Oliver Heins:

Hi Peter,

Peter Rolf writes:

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I get the same 'kind of knockedout' text as in the other example... but the black text is set as /DeviceGray and not /DeviceCMYK (k-component). You can make this visible by using 'Vorschau: Separiert' with the option 'Einblenden: Nicht-DeviceCMYK'.

I think this is just a limitation of the previewer. You can define your own cmyk black with \definecolor[myblack][k=1]. I bet that the knockedout effect will vanish with cmyk black (untested).

You're right. With k=1, the 'kind of knockedout' vanishes. Thank you very much, Peter!

You are welcome!

So is it advisable to change all black to cmyk black or can I safely rely on the DeviceGray black?

I donno. Best ask your printing house what they prefer in this case. Just an additional comment about prepress. A very good and gratis pdf book (only in german!) about prepress basics can be found here: http://www.cleverprinting.de/ratgeber2009.html Simply press "Jetzt als kostenloses PDF herunterladen" at the end of the page to get a copy. If you like it, buy it (as it's also very cheap for technical literature). Best wishes, Peter

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Can you test the following? My Acrobat is on a machine without net, and my usb stick broke within the experiments.

prepress mess + bad luck => *have a break and enjoy your weekend* :)

Well, due to your kind help, I'm able to do so now :-)

Thanks again, olli