From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/109467 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jano Kula Newsgroups: gmane.comp.tex.context Subject: Re: Bug in overprint? 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On Wed, 11 Nov 2020 at 01:25, Andres Conrado Montoya Acosta < elandi@chiquitico.org> wrote: > may I ask someone, who understands knockout and overprint in the printing >> press, to check test cases in the attached file from the test suite, if >> overprint is working or not in Mark IV, please? >> >> Regards, >> Jano >> >> > Hi Jano, as far as I can check with my pdf editors, it seems overprinting > is working. The black ink is printed above the blue, with no white reserv= e > below it. > Sorry for the delay, I had to downsample the screenshots after the original reply didn't get through (too big) and in the end remove them completely. Thank you for checking. Looks like a bug in Acrobat (older version 11.0.23), not ConTeXt. What editors do you use? After your test I was digging deeper. When I disable black plate in *Previe= w: Separations* it doesn't show an overprint, the room under the letters is white (original problem). When I remove one overprint manually in Illustrator, Acrobat shows the remaining overprints. I've found out later, I could use *Profile: Color Warnings*, where all overprints are visible, but I would rather see it in separated plates. Hope this helps someone in the future, too. Jano --0000000000001b4cff05b4398d31 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hello Andr=C3=A9s!

On Wed, 11 Nov 2020= at 01:25, Andres Conrado Montoya Acosta <elandi@chiquitico.org> wrote:
may I ask someone, who understands knockout and overprint in the printing press, to check test cases in the attached file from the test suite, if
overprint is working or not in Mark IV, please?

Regards,
Jano


Hi Jano, as far as= I can check with my pdf editors, it seems overprinting is working. The bla= ck ink is printed above the blue, with no white reserve below it.

Sorry for the delay, I had to downs= ample the screenshots after the original reply didn't get through (too = big) and in the end remove them completely.

Thank you for= checking. Looks like a bug in Acrobat (older version 11.0.23), not ConTeXt= .
What editors do you use?

After your test I was digging d= eeper.=C2=A0When I disable black plate in Preview: Separations=C2=A0= it doesn't show an overprint,=C2=A0the room=C2=A0under the letters is w= hite (original problem).=C2=A0When I remove one overprint manually in Illus= trator, Acrobat shows the remaining overprints. I've found out later, I= could use Profile: Color Warnings, where all overprints are visible= , but I would rather see it in separated plates.

Hope this helps someone in the future, too.
Jano
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