Definitions for "Color Separating"
The process of optically "breaking apart" colors in the original into four separate black-and-white photographic records, each of which is a map detailing how much each of the four inks (black, cyan, magenta and yellow) are needed to print a color reproduction.
The process of getting each color of a printed piece on to its' own printing plate.
The process of separating the primary color components for printing.