Definition: UnderColour Removal: technique for reducing the amount of cyan, magenta and yellow ink where they combine to form neutral tones, and those colours which contain all three of cyan, magenta and yellow, by replacing some of the trichromatic grey with an equivalent quantity of black ink. * The grey is removed mostly from the shadow regions. * Black ink is cheaper than coloured ink: UCR saves money; UCR also reduces problems with trapping.

Related Terms: GCR

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