| 摘要 |
PURPOSE:To eliminate solid blacks, to enhance printing resistance and dimensional stability and image quality by forming an undercoat layer made of a binder resin and an inorg. pigment, and a precoat layer made of a water-soluble polymer, etc. CONSTITUTION:An undercoat layer 2, a precoat layer 3, a water-resistant layer 4, and a zinc oxide photosensitive layer 5 are formed in succession on a substrate 1, and a layer enhanced in conductivity by treatment is formed on the reverse side of the substrate 1. The undercoat layer 2 consists of an inorg. material and a binder resin composed essentially of polyethylene ionomer and an emulsion resin, and the precoat layer 3 consists of 30-70pts.wt. of a water- soluble polymer, and 70-30pts. of polythylene ionomer and an emulsion resin, and in an ionomer to emulsion resin ratio of 1:(0.5-2). |
