No doubt you will have seen the multi-colour portraits of Andy Warhol and the pop art creations of Roy Lichtenstein. Well, screenprinting was their medium of choice!
Screenprinting is form of stencilling. An image is cut into a sheet of paper or plastic film, creating a stencil. The artist covers areas of the paper which they don't want to be covered with paint with the stencil and then they apply a wash of paint using a screen. In addition to stencils, a photographic image can also be reproduced on the screen using light-sensitive gelatins.