Printing Terms Glossary

UCA – Undercolor Addition. A prepress term describing a technique of making color separations that increases the amount of cyan, magenta or yellow ink in shadow areas.

UCR – Undercolor Removal. TA prepress term describing a technique of making color separations such that the amount of cyan, magenta and yellow ink is reduced in midtone and shadow areas while the amount of black is increased.

Uncoated Paper – A paper that has not been coated with clay. Also referred to as offset paper.
 
Unsharp Masking – A prepress term describing a technique of adjusting dot size to make a halftone or separation appear sharper (in better focus) than the original photo or the first proof. Also referred to as edge enhancement and peaking.
 
Up – A general term used to indicate multiple copies of one image printed in one impression on a single sheet. “Two up” or “three up” means printing the identical piece twice or three times on each sheet.
 
UV Coating – A high gloss liquid coating that is applied to a printed sheet, then bonded and cured with ultraviolet light.

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