The printing screen, from which the process gets its name, is a very fine mesh screen which is initially covered with a thermally reactive emulsion. A separate screen is required for each of the colours featured in the final artwork and a celluloid film is also made for each colour.
The film is black in the areas where the colour is required on the disc, and clear where it is not required. The film is attached on top of a screen and placed into an exposure unit. A hot, bright light is then briefly switched on over the top of the film.
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