then build the PDF with: pdflatex test.tex
Combine 4 grayscale images into a final CMYK image - ImageMagickĮxample: first, create RGB pdf with Latex (from ) use this as test.tex: \documentclass.CMYK colors inverted with draw or annotate - ImageMagick forum.You should be able to use Imagemagick's convert to combine CMYK separations references: