Subli Blanks print full colour pictures by using the colours Cyan, Magenta, Yellow and Black (CMYK).
In this "subtractive" process the various inks absorb the light reflected from the underlying white paper
to produce the colours that your eye sees. The colours that you see are those colours which were not
absorbed by the ink. It is called subtractive because when you subtract the other colours,
the colour that is left is the colour that you see.
In the CMYK colour system equal proportions of Yellow ink plus Cyan ink produces Green,
Yellow ink plus Magenta ink produces Red, and Cyan ink plus Magenta ink produces Blue
(actually more like purple to most eyes). Various colour shades and values are achieved
by varying the relative amounts of the four colours. Black ink is added to improve the quality
of 3-colour blacks, to provide added detail to images, to speed drying, and to reduce overall ink costs,
thus the name: Four colour Process.
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