U – Glossary of Print and Design Terms

Welcome to our comprehensive glossary of print and design terms. We are continually seeking to grow and improve this glossary, so if you spot any definition you do not agree with, a term that is missing, or have any comments in general, please email our reference team.

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UncalenderedPapers that are not smoothed by going through the calendering process
Uncoated PaperPaper that has not been coated with clay. Also called offset paper
Undercolour Addition (UCA)Technique of making colour separations that increases the amount of cyan, magenta or yellow ink in shadow areas
Undercolour Removal (UCR)Technique of making colour 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
UndersideSurface of seb paper which receives the impression of machine wire on papermaking machine
Unsharp MaskingTechnique of adjusting dot size to make a halftone or separation appear sharper (in better focus) than the original photo or the first proof. Also called edge enhancement and peaking
UpTerm 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
UprightA term given to books bound on the longer dimension
URLUniform Resource Locator, i.e. the address of a Web page or other Web resource
USBUniversal Serial Bus. A standard connection between computers and peripherals such as mice, keyboards, printers, hard discs and scanners
User InterfaceThe point at which the user interacts with a device or piece of software viewed on a monitor
UV CoatingLiquid applied to a printed sheet, then bonded and cured with ultraviolet light
UV InkIn printing, solventless inks that are cured by UV radiation. They are used extensively in screen printing, narrow web letterpress and flexographic printing