Undercolor separation
Updated: 04/26/2017 by Computer Hope
Undercolor separation is the CMYK (cyan, magenta, yellow, and key) color model to covert cyan, magenta, and yellow to equivalent grays when printing a color document. This separation produces higher quality grays than grays produced when cyan, magenta, and yellow are mixed. The CMYK color model adds black to cyan, magenta, and yellow to make richer black hues.