Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black?

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!news.musoftware.de!wum.musoftware.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	Helge Blischke <h.blischke@acm.org>
Newsgroups	comp.lang.postscript
Subject	Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black?
Followup-To	comp.lang.postscript
Date	Thu, 26 Jan 2012 21:07:59 +0100
Lines	57
Message-ID	<9odq51Fj34U1@mid.individual.net> (permalink)
References	<208ecf3d-3629-4672-9a3e-135e44701d6b@p13g2000yqh.googlegroups.com> <MPG.28568d9998586243989843@usenet.plus.net> <b74db57b-8b40-4310-8424-ea72199ffb18@v10g2000yqn.googlegroups.com> <954h65Fq7bU1@mid.individual.net> <20028936.2019.1327502419377.JavaMail.geo-discussion-forums@yqy38> <9oak8rFgnoU1@mid.individual.net> <7143656.5209.1327588911034.JavaMail.geo-discussion-forums@yqbc11>
Mime-Version	1.0
Content-Type	multipart/mixed; boundary="nextPart1936005.56mABFhMhk"
X-Trace	individual.net kW2rf9oaKW4kWhfqctcFqgNyU2/ECwWEW+aw1TgdL8CadABW3l
Cancel-Lock	sha1:jlihLy9vp8w8+vNSdAqnP5BXI1Y=
User-Agent	KNode/0.99.01
Xref	x330-a1.tempe.blueboxinc.net comp.lang.postscript:598

Followups directed to: comp.lang.postscript

Show key headers only | View raw

[Multipart message — attachments visible in raw view] - view raw

ole.hoppe@gmail.com wrote:

> Thanks a lot for quick reply!
> 
> Tried the "true setoverprint" as you mentioned, but didn't help. I'm using
> the tiffsep ghostscript device for checking like sdaau did.
> 
> I'm wondering if it made a difference to first convert the rgb-PDF to cmyk
> and then apply your procedure? It appears Postscript defines overprinting
> only for subtractive color models like cmyk, not for additive ones like
> rgb. And forceblack.ps is assuming an rbg color model, isn't it? Again,
> feel not in a position to quickly modify forceblack.ps to cmyk colorspace.
> Would that be a big thing for you?-)
> 
> Thanks again!
> Ole

Well, the issue of the original poster indeed was RGB only. I just modified 
the script to handle both RGB and CMYK color spaces. Try it out and let me 
know if it works as expected.

Helge

Back to comp.lang.postscript | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? sdaau <sd@imi.aau.dk> - 2011-06-05 22:49 -0700
  Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? Matti Vuori <xmvuori@kolumbus.fi> - 2011-06-06 08:41 +0000
  Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? Helge Blischke <h.blischke@acm.org> - 2011-06-06 11:26 +0200
    Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? sdaau <sd@imi.aau.dk> - 2011-06-06 04:29 -0700
  Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ken <ken@spamcop.net> - 2011-06-06 14:05 +0100
    Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? sdaau <sd@imi.aau.dk> - 2011-06-06 08:34 -0700
      Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ken <ken@spamcop.net> - 2011-06-06 17:28 +0100
      Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ken <ken@spamcop.net> - 2011-06-07 10:21 +0100
        Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? sdaau <sd@imi.aau.dk> - 2011-06-09 05:28 -0700
          Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ken <ken@spamcop.net> - 2011-06-09 14:00 +0100
            Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? sdaau <sd@imi.aau.dk> - 2011-06-09 06:48 -0700
              Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ken <ken@spamcop.net> - 2011-06-09 16:06 +0100
          Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2011-09-16 18:33 -0400
    Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? sdaau <sd@imi.aau.dk> - 2011-06-06 09:17 -0700
      Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? Helge Blischke <h.blischke@acm.org> - 2011-06-06 19:30 +0200
        Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ole.hoppe@gmail.com - 2012-01-25 06:40 -0800
          Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? Helge Blischke <h.blischke@acm.org> - 2012-01-25 16:09 +0100
            Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ole.hoppe@gmail.com - 2012-01-26 06:41 -0800
              Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? Helge Blischke <h.blischke@acm.org> - 2012-01-26 21:07 +0100
              Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ole.hoppe@gmail.com - 2012-01-26 12:57 -0800
            Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? ole.hoppe@gmail.com - 2012-01-26 12:58 -0800

csiph-web