Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!npeer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail From: ole.hoppe@gmail.com Newsgroups: comp.lang.postscript Subject: Re: PDF to PDF (gs?): rich RGB black to plain K (CMYK) black? Date: Thu, 26 Jan 2012 06:41:50 -0800 (PST) Organization: http://groups.google.com Lines: 14 Message-ID: <7143656.5209.1327588911034.JavaMail.geo-discussion-forums@yqbc11> References: <208ecf3d-3629-4672-9a3e-135e44701d6b@p13g2000yqh.googlegroups.com> <954h65Fq7bU1@mid.individual.net> <20028936.2019.1327502419377.JavaMail.geo-discussion-forums@yqy38> <9oak8rFgnoU1@mid.individual.net> Reply-To: comp.lang.postscript@googlegroups.com NNTP-Posting-Host: 174.124.92.184 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1327588911 18025 127.0.0.1 (26 Jan 2012 14:41:51 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Thu, 26 Jan 2012 14:41:51 +0000 (UTC) In-Reply-To: <9oak8rFgnoU1@mid.individual.net> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=174.124.92.184; posting-account=VQ5b8QoAAABMZyv3OhqVAb6tkkalLMOc User-Agent: G2/1.0 X-Google-Web-Client: true Xref: x330-a1.tempe.blueboxinc.net comp.lang.postscript:594 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 o= nly 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 no= t in a position to quickly modify forceblack.ps to cmyk colorspace. Would t= hat be a big thing for you?-) Thanks again! Ole