Definition: Colour separation
UN - Geographic Information Systems
The process of dividing a graphical document into separate pages or files for each of four colours (cyan, magenta, yellow and black). Colour separation is the basis of most professional printing processes.
United Nations, "Handbook on Geospatial Infrastructure in Support of Census Activities", Department of Economic and Social Affairs, Statistics Division, Studies in Methods, Series F No. 103, New York, 2009