title: How to create CMYK color seperation combinations using GhostScript
body: <p>I created color separations using</p>
  
  <p>gs -sDEVICE=tiffsep -dNOPAUSE -dBATCH -dSAFER -r600x600 -sOutputFile=p%08d.tif input.pdf</p>
  
  <p>The outputs are all greyscale separations as documented. </p>
  
  <p>Questions
  1. How do I combine just the CYAN and MAGENTA separations (or any combination of colors) to make a PDF file?
  2. How do I make sure the output PDF from the combo is in color and not greyscale?</p>
  
  <p>Thanks.</p>