physics
posted by sam .
what colors of ink do color ink jet printers use to produce a full range of colors? do the colors form by color addition or by color subtraction?

physics 
drwls
Ink works by subtracting colors from the white light that illuminates them. Each allows a fairly wide rainge of wavelengths to be reflected; the reflected light is not highly monochromatic. The colors look a lot different from the red, blue and green that are used in color addition. Frequent ink color choices are magenta, yellow and cyan. See
http://en.wikipedia.org/wiki/Subtractive_color
for more about how it works
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