Color separation for printing with non-standard inks

The printing process that uses an arbitrary set of inks, deposited on a substrate in an arbitrary order through variable ink masks is referred to as non-standard printing. The color separation consists of deriving the ink mask values that print with the specific set of inks to the desired color. The color separation method proposed in this paper introduces a special partition of the color space in tetrahedrons, that enables baricentric interpolation of any arbitrary input color as function of tetrahedron vertices. The vertices are selected in the points corresponding to representation of the color combinations resulted by overlapping of the input colors set in the color space