Achieving the same color visual output on the print by applying CMY and CMYK combination of inks

Recent graphic arts reproduction methods very often use achromatic models. The basic idea is to find the joined achromatic part of CMY in the desired (mostly tertiar color) or the whole image, and change it with black partially or in the full amount. A programmed way of the high amount achromatic substitution, proposed in this research, can produce a satisfactory result with no significant loss in perception of colors.