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* overprinting backgrounds
@ 2009-12-08  8:57 Oliver Heins
  2009-12-08 13:05 ` Peter Rolf
  0 siblings, 1 reply; 5+ messages in thread
From: Oliver Heins @ 2009-12-08  8:57 UTC (permalink / raw)
  To: mailing list for ConTeXt users

I have another question.

The print shop wants the background image to be overprinted.  Is it
sufficiant to set »overprint=yes« once in \setupcolors or does one need
to explicitely tell the region with \startoverprint ... \stopoverprint?

A minimal example:

% \startminimalexample
\setupcolors[state=start,cmyk=yes,rgb=no,overprint=yes]

\definelayer	[mybg]
		[x=0mm, y=0mm,
		width=\paperwidth, height=\paperheight,
                repeat=yes]
\setlayer	[mybg]
		[hoffset=5cm, voffset=7cm]
		{\externalfigure[sample/hacker.jpg][max]}
\setupbackgrounds[page][background=mybg]

\starttext

Is this sufficiant for overprinting?

\dorecurse{4}{\input tufte\par}

\page

\startoverprint
Or does one need to explicitely tell context the region?

\dorecurse{4}{\input tufte\par}
\stopoverprint

\stoptext
%\stopminimalexample

Thanks again,
 olli

-- 
Oliver Heins heins@sopos.org    http://oliverheins.net/
http://blog.overheins.net/     F27A BA8C 1CFB B905 65A8
http://scriptorium-adp.de/     2544 0F07 B675 9A00 D827
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^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: overprinting backgrounds
  2009-12-08  8:57 overprinting backgrounds Oliver Heins
@ 2009-12-08 13:05 ` Peter Rolf
  2009-12-11 17:11   ` Oliver Heins
  0 siblings, 1 reply; 5+ messages in thread
From: Peter Rolf @ 2009-12-08 13:05 UTC (permalink / raw)
  To: mailing list for ConTeXt users

Oliver Heins schrieb:
> I have another question.
>
> The print shop wants the background image to be overprinted.  Is it
> sufficiant to set »overprint=yes« once in \setupcolors or does one need
> to explicitely tell the region with \startoverprint ... \stopoverprint?
>
>   
simply use \startoverprint ... \stopoverprint for the text regions. you 
may need to add \startknockout ... \stopknockout for picture elements in 
that region. the "overprint=yes" option is for document wide setting, so 
this is not what you want.
anyhow, if you own a copy of acrobat, you can visualize the overprinted 
elements in the output preview (color warnings).

Peter

> A minimal example:
>
> % \startminimalexample
> \setupcolors[state=start,cmyk=yes,rgb=no,overprint=yes]
>
> \definelayer	[mybg]
> 		[x=0mm, y=0mm,
> 		width=\paperwidth, height=\paperheight,
>                 repeat=yes]
> \setlayer	[mybg]
> 		[hoffset=5cm, voffset=7cm]
> 		{\externalfigure[sample/hacker.jpg][max]}
> \setupbackgrounds[page][background=mybg]
>
> \starttext
>
> Is this sufficiant for overprinting?
>
> \dorecurse{4}{\input tufte\par}
>
> \page
>
> \startoverprint
> Or does one need to explicitely tell context the region?
>
> \dorecurse{4}{\input tufte\par}
> \stopoverprint
>
> \stoptext
> %\stopminimalexample
>
> Thanks again,
>  olli
>
>   

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
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___________________________________________________________________________________


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: overprinting backgrounds
  2009-12-08 13:05 ` Peter Rolf
@ 2009-12-11 17:11   ` Oliver Heins
  2009-12-11 17:16     ` Martin Schröder
  0 siblings, 1 reply; 5+ messages in thread
From: Oliver Heins @ 2009-12-11 17:11 UTC (permalink / raw)
  To: mailing list for ConTeXt users

Peter Rolf <indiego@gmx.net> writes:

> Oliver Heins schrieb:
>> I have another question.
>>
>> The print shop wants the background image to be overprinted.  Is it
>> sufficiant to set »overprint=yes« once in \setupcolors or does one need
>> to explicitely tell the region with \startoverprint ... \stopoverprint?
>>
>>   
> simply use \startoverprint ... \stopoverprint for the text
> regions. you may need to add \startknockout ... \stopknockout for
> picture elements in that region. the "overprint=yes" option is for
> document wide setting, so this is not what you want.
> anyhow, if you own a copy of acrobat, you can visualize the
> overprinted elements in the output preview (color warnings).

I managed to get a copy of acrobat.  Now I understand the benefits and
risks of overprinting.  Thank you for pointing out!

Best regards,
 olli

-- 
Oliver Heins heins@sopos.org    http://oliverheins.net/
http://blog.overheins.net/     F27A BA8C 1CFB B905 65A8
http://scriptorium-adp.de/     2544 0F07 B675 9A00 D827
1024D/9A00D827 2004-09-24 -- gpg --recv-keys 0x9A00D827
Please avoid sending me Word or PowerPoint attachments:
http://www.gnu.org/philosophy/no-word-attachments.html
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: overprinting backgrounds
  2009-12-11 17:11   ` Oliver Heins
@ 2009-12-11 17:16     ` Martin Schröder
       [not found]       ` <874onxfll5.fsf@sopos.org>
  0 siblings, 1 reply; 5+ messages in thread
From: Martin Schröder @ 2009-12-11 17:16 UTC (permalink / raw)
  To: mailing list for ConTeXt users

2009/12/11 Oliver Heins <olli@sopos.org>:
> I managed to get a copy of acrobat.  Now I understand the benefits and
> risks of overprinting.  Thank you for pointing out!

It's typical for printing houses to set 100% black to overprint in the
preprint workflow (can also be done with Acrobat).

Best
   Martin
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: overprinting backgrounds
       [not found]         ` <68c491a60912111004q1828258ag89945efe84ebc563@mail.gmail.com>
@ 2009-12-12 17:40           ` Oliver Heins
  0 siblings, 0 replies; 5+ messages in thread
From: Oliver Heins @ 2009-12-12 17:40 UTC (permalink / raw)
  To: mailing list for ConTeXt users

Hi Martin,

Martin Schröder <martin@oneiros.de> writes:

> Am 11. Dezember 2009 18:48 schrieb Oliver Heins <olli@sopos.org>:
>> schön von dir zu hören :).  Ich hoffe, dir geht es gut!
>
> Yep. Und nächstes Jahr komme ich auch mal nach Hannover. :-)

Und ich vielleicht nach Dortmund, schließlich ist da Tagung :)

>>> It's typical for printing houses to set 100% black to overprint in the
>>> preprint workflow (can also be done with Acrobat).
>>
>> Das heißt, dass die Druckerei schwarzen Text, der in meinem PDF auf
>> Knockout steht, noch auf Overprint umschalten kann?
>
> Sollte sie, weil das ist eine ganz normale Anforderung: Schwarzer Text
> soll überdrucken. Das geht auch im Acrobat (Preflight und dann in den
> Profilen suchen).

Hab ich jetzt gefunden, danke.  War hilfreich, um das Problem zu
verstehen.

>> Mein Problem ist, dass die Druckerei anmeckert, dass ein Bereich mit
>> schwarzem Text vor einem Hintergrundbild eben nicht auf Überdrucken
>> gestellt ist.  Was aber eben nur halb wahr ist: Der Bereich ist sehr
>> wohl auf Überdrucken gestellt (kann man im Acrobat unter
>> Ausgabevorschau->Vorschau->Farbwarnungen->Überdrucken_anzeigen sehen
>> kann), gleichwohl wird schwarzer Text (und nur schwarzer! andere Farben
>> werden korrekt separiert!), wenn man die schwarze Farbe in der Vorschau
>> entfernt, regelrecht aus dem Hintergrundbild herausgeschnitten:
>> http://www.sopos.org/olli/overprinting.jpg
>
> 403 :-(

Wenn man's nicht jedesmal überprüft... scp erhält offensichtlich die
Dateirechte, und die waren auf 0600 gesetzt :(  Jetzt sollte es
funktionieren.

Das Problem scheint allerdings gelöst: ein Fehler in der Anzeige des
Acrobat im Zusammenhang mit der /DeviceGray-Farbpalette.  Wenn man
cmyk-Schwarz benutzt oder das Dokument dahin konvertiert, geht alles.
:-)

> Ich bin Montag wieder am Arbeitsplatz und habe dann Zugriff auf einen
> Acrobat.

Ich sende dir Montag mal einen Link zur aktuellen Version der Broschüre.
Wäre toll, wenn du kurz einen Blick drauf werfen könntest, ob dir etwas
auffällt.  Im Prepress-Bereich bin ich blutiger Anfänger :(

Herzlichen Gruß,
 olli

-- 
Oliver Heins heins@sopos.org    http://oliverheins.net/
http://blog.overheins.net/     F27A BA8C 1CFB B905 65A8
http://scriptorium-adp.de/     2544 0F07 B675 9A00 D827
1024D/9A00D827 2004-09-24 -- gpg --recv-keys 0x9A00D827
Please avoid sending me Word or PowerPoint attachments:
http://www.gnu.org/philosophy/no-word-attachments.html
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2009-12-12 17:40 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-12-08  8:57 overprinting backgrounds Oliver Heins
2009-12-08 13:05 ` Peter Rolf
2009-12-11 17:11   ` Oliver Heins
2009-12-11 17:16     ` Martin Schröder
     [not found]       ` <874onxfll5.fsf@sopos.org>
     [not found]         ` <68c491a60912111004q1828258ag89945efe84ebc563@mail.gmail.com>
2009-12-12 17:40           ` Oliver Heins

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