GCR

Gray Component Replacement is a variant of the color build-up in printing.

GCR and UCR (Under Color Removalare opposite processesFiguratively speaking,this means: While UCR creates color image, and then replaces the deep dark values by blackGCR creates a black and white imageand then colorizes itas this was done in the past, for example, with colored engravings.

A lower ink consumption results in GCR as well as in UCR in faster dryingless ink consumption and also in a better reproduction of images.