| 摘要 |
PURPOSE:To enhance water retentivity of an offset printing plate, that is, resistance to ink stains by forming a silver halide emulsion layer and a physical development nucleus layer on a support to form the printing plate, and incorporating a specified solvent in both or either of both layers. CONSTITUTION:The printing plate is prepared by forming the silver halide emulsion layer and the physical development nucleus layer on the support, and the solvents represented by formulae [I] and/or [II] are incorporated in both or either of both layers in an amount of 1-100mg/m<2>, optimally, 30-60mg/m<2>, and if they are used above 100mg/m<2>, trouble occurs in coatability and DTR developability is deteriorated. As the silver halide emulsion layer, any silver halide composed of silver chloride, bromide, chlorobromide, or chloroiodide may be used, and as the physical development nuclei, metals, such as antimony, bismuth, and lead, and their sulfides can be used. |
