| 摘要 |
PURPOSE:To obtain the titled paper having the excellent initial coloring property, final image density and writing property by incorporating a silica and a polyvinyl alcohol in a specified ratio in a precoat layer. CONSTITUTION:The precoat layer is formed between a photosensitive layer and a substrate paper. And, the precoat layer contains 60-300pts.wt. the polyvinyl alcohol based on 100pts.wt. the silica, and the smoothness of the surface of a photosensitive paper is 35-60sec. Thus, a diazonium compd. etc. contained in a diazophotosensitive layer is prevented to penetrate into the substrate paper, thereby obtaining a copy image having the good initial coloring property and the high final image density. As the smoothness of the surface of the photosensitive paper is in the specified range, the writing property of the titled paper is improved. |
