| 摘要 |
PURPOSE:To obtain the titled material having the excellent reproducibility of negative- positive rules namely the excellent block copy characteristics by controlling the amount of a silver deposit nucleus contg. in two uninterrupted image receiving layers mounted on a supporting body to a specified ratio, and incorporating a specified amount of a white pigment in an under layer. CONSTITUTION:The supporting body is composed of a resin coated paper for a general photographic use and a polyethylene terephthalate film, etc., and the layer which is mounted on said body as the under layer, is composed of a hydrophilic colloid, the silver deposit nucleus and the white pigment which is composed of titanium dioxide and zinc oxide, etc., and does not flux and disappear by a photographic processing. The amount of the hydrophilic colloid is about 0.5-3.0g/m<2>, and the amount of the silver deposit nucleus is 150-1,000mg/m<2>, and the amount of the white pigment is 0.3-10g/m<2>. And, further, the upper layer composed of the hydrophilic colloid and the silver deposit nucleus is mounted on said the upper layer. The amount of the hydrophilic colloid of the upper layer is 0.2-1.0g/m<2>, and the amount of the silver deposit nucleus of the upper layer is 1-30wt.% of said nucleus contd. in said the under layer. Thus, the printing plate of the negative and positive rules having the good reproducibility is obtd. |
