I'm not knowledgeable in postscript, but I'm trying to programatically
convert postscript files to pure black and white (no greyscale). So
graphics become pure black, and the background remains white.
I've been told to add this line "{.999 lt {0}{1}ifelse} settransfer"
before the first instruction in a postscript file. This works for 95% of
the graphics. Graphics that are certain colors still are not converted to
black, i.e. red and cyan. Any suggestions? Is there anything in the
postscript file that I should search for and change?
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