Posted almost 11 years ago. Visible to the public.

Convert the colorspace of a PDF from RGB to CMYK under Ubuntu Linux

Note that converting from RGB to CMYK will usually degrade your colors because no exact mapping is possible. Anyway, this Stackoverflow post Archive worked for me:

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gs -dSAFER -dBATCH -dNOPAUSE -dNOCACHE -sDEVICE=pdfwrite \ -sColorConversionStrategy=CMYK -dProcessColorModel=/DeviceCMYK \ -sOutputFile=output.pdf input.pdf

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Henning Koch
Last edit:
about 10 years ago
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We are makandra and do test-driven, agile Ruby on Rails software development.
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Posted by Henning Koch to makandra dev
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