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PDF export that identifies B&W and Colour pages (CMYK?) [closed]

asked 2014-03-02 19:30:42 +0100

oliver.kellow gravatar image

updated 2020-08-20 14:43:37 +0100

Alex Kemp gravatar image

My printshop operator said something about exporting a PDF where the printer prints B&W pages BW and pages with images (ie colour) in Colour- this can save me large chunks of cash now and in the future as they really gouge you for colour at printshops.

I am taking a leap and assuming it is something to do with CMYK vs RGB as K is definite black as opposed to darkblue or however RGB approximates black.

Does anyone know if LibreOffice can export this way, it seems a real boon for a desktop publisher to have, especially in the academic environment where I am constantly printing out wads and wads of papers and drafts etc, with a few colour coded tables here and there, and yes I know i can separate them, but its really quite a timewaster.

My default settings PDF did not differentiate and I cannot find any specific option in LibreOffice. I would also be fine using a third party PDF-CMYK tool if anyone knows.

Libreoffice 4,1,4,2 Windows 7

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Closed for the following reason the question is answered, right answer was accepted by Alex Kemp
close date 2016-02-20 06:20:41.224035


I am searching for the same solution! (didn't find it so far). However, if you have Adobe Acrobat installed - when printing to PDF, you can choose conversion types like Press or High quality (just click Preferences or Properties next to Adobe PDF printer in Printing dialog) and it will export it as CMYK (where black K = 100% and others CMY = 0% each).

Ljiljan gravatar imageLjiljan ( 2014-03-02 23:36:12 +0100 )edit

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answered 2014-03-03 00:39:42 +0100

m.a.riosv gravatar image

Maybe the option in writer for print text in black, can help: Menu/Tools/Options/LibreOffice writer

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I use pdf creator, it has the option to select the color type for pdf output.

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I think this has nothing to do with CMYK? Print text in black is probably RGB (0,0,0) and not CMYK (0,0,0,100). The problem when exporing to PDF is that text looks like black, but it is not black to CMYK printers :)

Ljiljan gravatar imageLjiljan ( 2014-03-03 20:10:17 +0100 )edit

answered 2014-03-03 00:43:29 +0100

oweng gravatar image

updated 2014-03-06 10:37:59 +0100

This is not a job for an office suite, but rather a post-processing tool, such as ghostscript (gs) or pdftk that can manipulate PDF files. It is possible to export greyscale pages to one PDF and all colour pages to another PDF. The colour PDF can then, if required, be converted from RGB to CMYK, although any decent print shop can do this anyway. Example ghostscript command:

$ gs -o cmyk.pdf -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress -sProcessColorModel=DeviceCMYK -sColorConversionStrategy=CMYK -sColorConversionStrategyForImages=CMYK rgb.pdf
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well i had a good play with both python and ghostscript but after three hours ended up with exactly nothing but handfuls of hair :P

oliver.kellow gravatar imageoliver.kellow ( 2014-03-03 03:44:29 +0100 )edit

I receive this error: "ColorConversionStrategy is incompatible to ProcessColorModel". Unrecoverable error: rangecheck in .putdeviceprops ???

Ljiljan gravatar imageLjiljan ( 2014-03-03 20:08:21 +0100 )edit

@Ljiljan, the command works under GhostScript v9.05, although it is always possible a newer version has changed the paramaters. Does /DeviceCMYK instead of simply DeviceCMYK for the Process Color Model make any difference?

oweng gravatar imageoweng ( 2014-03-06 10:45:26 +0100 )edit

It does work now :) thanks

Ljiljan gravatar imageLjiljan ( 2014-03-09 10:42:14 +0100 )edit

answered 2014-03-03 00:48:23 +0100

ROSt52 gravatar image

As an alternative to Adobe pdf Writer I am using the pdf955 suite. This allows to select black&white or color under Properties > Paper/Quality

There is a free version with commercials or you can get a license for little money.

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Asked: 2014-03-02 19:30:42 +0100

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Last updated: Mar 06 '14