(57) A method of preprinting information, e.g. coordinate information, onto a sheet of
unexposed electrophotographic material is disclosed. The method comprises either (a)
depositing an image-forming layer on the electrophotographic material and generating
the required preprinted Information as an image in said layer, or (b) securing an
image-bearing layer to the electrophotographic material.
There is also disclosed a composite material which comprises an electrophotographic
film which comprises a substrate (1; 4; 7; 11) and an image layer (2; 6; 8; 12) having
superposed on one surface thereof a secondary, image-bearing or image-receiving layer
(3; 5; 9; 13).
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