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A fresh new repo for small PDF utilities. #color_convert.sh + gray_to_spot.ps ./color_convert.sh black,cmyk,spot-PANTONE 705 U-0.9 0.1 0.5 0.1 input_layer1.pdf,input_layer2.pdf,input_layer3.pdf output.pdf This will convert each input PDF file to the corresponding color mode (black, cmyk or spot color), then combine the resulting files on top of each other. dependencies: pdftk (for multistamp) + Xpdf (for pdftops) # rgb2cmyk.sh ./rgb2cmyk.sh input.pdf This will convert a PDF to input-cmyk.pdf If you need overprint: ./rgb2cmyk.sh input.pdf overprint This will convert a PDF to input-cmyk-op.pdf # colorSeparation.sh ./colorSeparation.sh input-cmyk.pdf This makes black and white images of each CMYK plates and makes a small HTML page to preview the plates. It will output blank plates if your PDF is in RGB. Web interface for coloured preview of each plate: ![all](http://osp.constantvzw.org/api/osp.tools.PDFutils/bf1d20aadcbc417dbcbf9b7d2ffbfb1f63aa4339/blob-data/all.png) ![cyan](http://osp.constantvzw.org/api/osp.tools.PDFutils/51ee03bb8883e56147b50dade2fadef0e577f2bb/blob-data/cyan.png) ![magenta](http://osp.constantvzw.org/api/osp.tools.PDFutils/ebf3c97f5a70c3f44a491bd636cff9d3fa426398/blob-data/magenta.png) ![yellow](http://osp.constantvzw.org/api/osp.tools.PDFutils/46ed17c0e192bdca1781b79665c8b3c1806b3fd8/blob-data/yellow.png) ![black](http://osp.constantvzw.org/api/osp.tools.PDFutils/8eb6ff8fa341701b3443ad665929e21640a8ba42/blob-data/black.png) By zooming out, you can see several pages at the same time: ![](many pages]http://osp.constantvzw.org/api/osp.tools.PDFutils/628a1a1eb8067a46be8cc6d7680bb7fa2e7144f7/blob-data/many-pages.png)