ELECTROPHOTOGRAPHIC LITHOGRAPHIC PLATE MATERIAL

摘要

PURPOSE:To enhance resistances to water and solvents by forming on a substrate an intermediate layer made from an aq. water dispersion obtained by dispersing polyurethane having a specified transmittance and on this layer a photoconductive layer contg. zinc oxide. CONSTITUTION:The intermediate layer is obtained by coating one surface of a substrate with an aq. dispersion formed by dispersing polyurethane having a light transmittance of 34-99.5 in the case of testing a 0.03wt% aq. dispersion, into an aq. medium; or with an aq. dispersion formed by dispersing a vinyl type polymer having a light transmittance of 61-99.5 in the case of testing a 0.3wt% soln. A photoconductive layer contg. zinc oxide in an amt. of 20-30g/m<2> and a binder, such as an acrylic, silicone, or polyester resin, is laminated on the intermediate layer to obtain an electrophotographic lithographic plate.