Glossary

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Offset Lithography

A method of lithography by which the image is not printed direct from the plate but offset first onto a rubber covered cylinder, the blanket that performs the printing operation.

Opacity

Description of non-transparency in printing papers.

OPI

A process in which low resolution files are replaced automatically by high resolution files at pre-press stage.

Original

Any matter or image intended for reproduction

Overprint

Printing over an already printed area.