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If I draw in metapost with parameter 0.7 white it automatically considered as colorful pdf. Is there any parameter changing it?

The story is the following: On my job the printer prints colorful and monochrome pdf-pages in different ways. Colorful driver does not work properly, so if my black-and-white figure marked as colorful it became blue.

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    The default colour model is RGB, and white is defined to be the RGB colour (1,1,1). If you want only grey scale, then use a numeric instead of a color. So in your case try: draw ... withcolor 0.7. See p.28 of mpman – Thruston May 15 '17 at 16:45
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    You can also try setting defaultcolormodel := 3 – Thruston May 15 '17 at 17:08
  • Unfortunately, it did not help. Maybe printer use another strange algorithm... – newuser May 15 '17 at 18:09
  • Are you creating an .eps file from MP? and then making a PDF? Does your PDF creating tool provide any options? What is the printer? – Thruston May 15 '17 at 18:44
  • I compile to mps. Then open it in skim (it is a pdf viewer in MacOs) and print it from skim. The printer is Ricoh Aficio MP C4502a – newuser May 15 '17 at 18:55

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