Modified color removal dependent on tone

Details Modified color removal dependent on tone Modified color removal dependent on tone

B - Operations, Transporting

41

L

101/72

B41L 15/10 (2006.01) H04N 1/60 (2006.01)

Patent

CA 1222160

ABSTRACT OF THE DISCLOSURE A four color printing system wherein tone dependent color removal is to be utilized and the color components for the chromatic printing inks yellow (y), magenta (M) and cyan (C) are reduced and the amount of black printing ink (K) is increased so as to compensate for the reduction in the chromatic printing inks wherein a nearly completely non-chromatic format is utilized to a gray scale value which corresponds to the full tone of the black printing ink utilized. The color components of the color printing inks are then from this tone value increased from this gray scale up to the greatest image depth. So as to avoid separations, the color components of the chromatic printing inks are also increased in a subtonal area, particularly in the lighter area wherein reproductions can be made with or without gray scale balance.

428528

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