
Set of four halftone negatives for making plates for 4-color process printing.
Found on
http://www.e-printing.co.uk/glossary.htm

A full-color ad normally is generated through printing of four separate colors: yellow, cyan, magenta, and black. The color separation consists of four separate screens; one for each of those four colors.
Found on
http://www.encyclo.co.uk/local/21023

The production of a separate printing plate for each ink color that will be used to print an image. Four plates are used in process color separation, one each for Cyan, Magenta, Yellow, and Black, and an additional plate is used for each spot color.
Found on
https://www.xrite.com/learning/other-resources/glossary
No exact match found.