if someone wants to start implementing it in ghostscript it might be a 
start to look at this code that does color/monochrome splitting in the 
itexttoolbox:

http://itexttoolbox.svn.sourceforge.net/viewvc/itexttoolbox/main/dll/src/javastub.c?revision=98&view=markup

You should change the colormodell from RGB to CMYK (DISPLAY_COLORS_RGB) 
first.
Best regards,
Carsten


Leonard Rosenthol schrieb:
> You might want to look at something like pdftops from the Xpdf/Poppler 
> tool set which can generate separated Postscript (or a limited set of 
> separations).  The problem is complex (especially for vector 
> separations) which is why not too many do it...
> 
> There are commercial server-side solutions for doing it, including 
> Adobe’s LiveCycle Output Server among others.  You can also try 
> Ghostscript – it probably does it as well – or Pstill (another excellent 
> product).
> 
> Leonard
> 
> 
> On 6/19/09 12:46 PM, "vnug" <[email protected]> wrote:
> 
> 
> 
>     You are right ... we could use Acrobat. But, we are trying to
>     automate the
>     process of generating print separations programmaticaly.  Let me
>     know your
>     view. Thanks again for your feedback.
> 
>     best regards,
> 
> 
>     Leonard Rosenthol-3 wrote:
>     >
>     >  Those are also Postscript printers - so it seems like you would be
>     better
>     >  served by simply using Adobe Acrobat to just print separations...
>     >
>     >  Leonard
>     >
>     >  -----Original Message-----
>     >  From: vnug [mailto:[email protected]]
>     >  Sent: Friday, June 19, 2009 6:57 AM
>     >  To: [email protected]
>     >  Subject: Re: [iText-questions] Color Separations from PDF
>     >
>     >
>     >  Thanks, Leonard.
>     >
>     >  We have non-digital printers from Riso, Duplo and we print wedding
>     cards.
>     >  For the wedding cards, we have text in multiple colors (at this
>     point only
>     >  2
>     >  colors). For these printers to work if we can generate 2 separate
>     files
>     >  for
>     >  the colors ... that would help us to get the cards printed properly.
>     >
>     >  Let me know if you have any more questions or pointers. I would
>     appreciate
>     >  any information you can provide. Also, for developing this
>     solution ...
>     >  would appreciate any pointers.
>     >
>     >  best regards,
>     >
>     >
>     >  Leonard Rosenthol-3 wrote:
>     > >
>     > > Is it possible?  Yes.
>     > >
>     > > Is it easy?  No!
>     > >
>     > > It also depends on whether you are trying to accomplish raster
>     > > separations
>     > > or vector separations and what you plan to do with the seps when
>     you are
>     > > done.
>     > >
>     > > Given that separated PDFs haven't been part of any workflow formany
>     > > years,
>     > > I'd be curious to hear why you are investing in this today?
>     > >
>     > > Leonard
>     > >
>     > > -----Original Message-----
>     > > From: vnug [mailto:[email protected]]
>     > > Sent: Thursday, June 18, 2009 1:12 PM
>     > > To: [email protected]
>     > > Subject: [iText-questions] Color Separations from PDF
>     > >
>     > >
>     > > Hi:
>     > >
>     > > I have a PDF document and would like to create color seperation files
>     > > from
>     > > the PDF document. Is that something feasible programmatically? I
>     would
>     > > appreciate any information. Thanks in advance.
>     > >
>     > > best regards,
>     > > vnug
>     > > --
>     > > View this message in context:
>     > >
>     http://www.nabble.com/Color-Separations-from-PDF-tp24090846p24090846.html
>     > > Sent from the iText - General mailing list archive at Nabble.com.
>     > >
>     > >
>     > >
>     
> ------------------------------------------------------------------------------
>     > > Crystal Reports - New Free Runtime and 30 Day Trial
>     > > Check out the new simplified licensing option that enables unlimited
>     > > royalty-free distribution of the report engine for externally facing
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>     > > _______________________________________________
>     > > iText-questions mailing list
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>     > > Check the site with examples before you ask questions:
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>     > > You can also search the keywords list:
>     > > http://1t3xt.info/tutorials/keywords/
>     > >
>     > >
>     
> ------------------------------------------------------------------------------
>     > > Crystal Reports - New Free Runtime and 30 Day Trial
>     > > Check out the new simplified licensing option that enables unlimited
>     > > royalty-free distribution of the report engine for externally facing
>     > > server and web deployment.
>     > > http://p.sf.net/sfu/businessobjects
>     > > _______________________________________________
>     > > iText-questions mailing list
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>     > >
>     > > Buy the iText book: http://www.1t3xt.com/docs/book.php
>     > > Check the site with examples before you ask questions:
>     > > http://www.1t3xt.info/examples/
>     > > You can also search the keywords list:
>     > > http://1t3xt.info/tutorials/keywords/
>     > >
>     > >
>     >
>     >  --
>     >  View this message in context:
>     >
>     http://www.nabble.com/Color-Separations-from-PDF-tp24090846p24105513.html
>     >  Sent from the iText - General mailing list archive at Nabble.com.
>     >
>     >
>     >
>     
> ------------------------------------------------------------------------------
>     >  Crystal Reports - New Free Runtime and 30 Day Trial
>     >  Check out the new simplified licensing option that enables unlimited
>     >  royalty-free distribution of the report engine for externally facing
>     >  server and web deployment.
>     >  http://p.sf.net/sfu/businessobjects
>     >  _______________________________________________
>     >  iText-questions mailing list
>     >  [email protected]
>     >  https://lists.sourceforge.net/lists/listinfo/itext-questions
>     >
>     >  Buy the iText book: http://www.1t3xt.com/docs/book.php
>     >  Check the site with examples before you ask questions:
>     >  http://www.1t3xt.info/examples/
>     >  You can also search the keywords list:
>     >  http://1t3xt.info/tutorials/keywords/
>     >
>     >
>     
> ------------------------------------------------------------------------------
>     >  Crystal Reports - New Free Runtime and 30 Day Trial
>     >  Check out the new simplified licensing option that enables unlimited
>     >  royalty-free distribution of the report engine for externally facing
>     >  server and web deployment.
>     >  http://p.sf.net/sfu/businessobjects
>     >  _______________________________________________
>     >  iText-questions mailing list
>     >  [email protected]
>     >  https://lists.sourceforge.net/lists/listinfo/itext-questions
>     >
>     >  Buy the iText book: http://www.1t3xt.com/docs/book.php
>     >  Check the site with examples before you ask questions:
>     >  http://www.1t3xt.info/examples/
>     >  You can also search the keywords list:
>     >  http://1t3xt.info/tutorials/keywords/
>     >
>     >
> 
>     --
>     View this message in context:
>     http://www.nabble.com/Color-Separations-from-PDF-tp24090846p24109164.html
>     Sent from the iText - General mailing list archive at Nabble.com.
> 
> 
>     
> ------------------------------------------------------------------------------
>     Crystal Reports - New Free Runtime and 30 Day Trial
>     Check out the new simplified licensing option that enables unlimited
>     royalty-free distribution of the report engine for externally facing
>     server and web deployment.
>     http://p.sf.net/sfu/businessobjects
>     _______________________________________________
>     iText-questions mailing list
>     [email protected]
>     https://lists.sourceforge.net/lists/listinfo/itext-questions
> 
>     Buy the iText book: http://www.1t3xt.com/docs/book.php
>     Check the site with examples before you ask questions:
>     http://www.1t3xt.info/examples/
>     You can also search the keywords list:
>     http://1t3xt.info/tutorials/keywords/
> 
> 
> -- 
> Leonard Rosenthol
> PDF Standards Architect
> Adobe Systems Incorporated
> 
> 
> ------------------------------------------------------------------------
> 
> ------------------------------------------------------------------------------
> Crystal Reports - New Free Runtime and 30 Day Trial
> Check out the new simplified licensing option that enables unlimited
> royalty-free distribution of the report engine for externally facing 
> server and web deployment.
> http://p.sf.net/sfu/businessobjects
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> iText-questions mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/itext-questions
> 
> Buy the iText book: http://www.1t3xt.com/docs/book.php
> Check the site with examples before you ask questions: 
> http://www.1t3xt.info/examples/
> You can also search the keywords list: http://1t3xt.info/tutorials/keywords/


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