UCR
Under Color Removal or Under Color Reduction is used when separating LAB or RGB to CMYK. The goal of under color reduction is to reduce the CMY parts in black pixels in order to reduce the overall color coverage.
Lexicon
UGRA
Ugra is the Swiss Centre of Competence for Media and Printing Technology. The UGRA is particularly active in the areas of control agents and certifications.
Uncoated paper
Refers to all papers that have not been finished with a coating application.