| abstract |
(57) [Summary] [Purpose] It is an object to provide a multicolor image forming material used for high-precision prepress color proofing by a surprint method, which gives a finish very close to that of a printed matter. It is an object of the present invention to provide a multicolor image forming material for obtaining a highly accurate prepress color proof which is excellent in that it can be handled in a bright room, is water-developable, and is excellent in register accuracy. [Structure] A photosensitive transfer sheet comprising a support and a colored photosensitive layer comprising a modified polyvinyl alcohol represented by the following general formula and an adhesive, which is peelable from the support, and a heat seal layer. (Wherein R 1 and R 2 each independently represent a hydrogen atom or an alkyl group, Y − represents a conjugated chlorinated ion of an acid, m represents an integer of 1 to 6, and n represents 0 or 1 Represents) |