Abstract: [Problem to be Solved] The object of the present invention is to provide an ethylene-vinyl acetate copolymer film having excellent adhesion properties and improved film formation properties. [Means for Solving Problem] An ethylene-vinyl acetate copolymer composition comprising ethylene-vinyl acetate copolymer, a crosslinker and trimellitic acid ester, wherein the trimellitic acid ester is contained in the range of 0.01 to 3.0 part by weight based on 100 parts by weight of ethylene-vinyl acetate copolymer.

Abstract: A multi-color transfer printing medium is comprised of at least two different kinds of microcapsules having a porous membrane and disposed on a substrate. Each kind of microcapsules contains a different electron-donating chromogenic material effective to produce a different color tone, and a different light-absorbing material effective to absorb a light of different wavelength. In use, the multi-color transfer printing medium is superposed with a color developing sheet coated with electron-accepting material, and is irradiated with lights of different wavelengths to transfer-print color image on the developing sheet to thereby obtain the multi-color image with a simple process at high speed.

Abstract: A multicolor imaging material comprises a substrate and a photosensitive layer comprising a heat-meltable microcapsule layer. The heat-meltable microcapsule has a capsule wall including an infrared absorbent and a coupling component as core material.The photosensitive layer comprises a heat-meltable microcapsule layer and a color forming layer comprising a diazonium compound and a basic substance. The color forming layer is formed between the substrate and the heat-meltable microcapsule layer.

Abstract: A multicolor imaging material comprises a substrate, a capsule layer made up of a plurality of heat-meltable microcapsules including color former and a developer material layer. When the laser beams having wavelengths of .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 are applied to the multicolor imaging material according to the signals corresponding to three primary colors, the heat-meltable microcapsules for individual colors independently generate heat, thereby causing the heat-meltable substance to be melted. This brings about the reaction of the color formers for individual colors with the developer to developer colors, thereby forming a color image comprised of cyan, magenta and yellow.