gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.3 -sColorConversionStrategy=CMYK -o shack-visitenkarte-cmyk-1.3.pdf shack-visitenkarte.pdf
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.3 -sColorConversionS
trategy=CMYK -o shack-visitenkarte-rueckseite-cmyk-1.3.pdf shack-visitenkarte-rueckseite.pdf
Caveats
See also
Keywords: Visitenkarte Visitenkarten