| 摘要 |
PURPOSE:To improve the color muddiness of the titled material, and to obtain the color image having high density by inserting a nonphotosensitive intermediate layer between two layers of thermal developing photosensitive layers, and by incorporating a prescribed amount of a binder and a hot solvent contg. in the nonphotosensitive intermediate layer in the titled material. CONSTITUTION:The nonphotosensitive intermediate layer is inserted between the thermal developing photosensitive layers having different color sensitivities respectively, and the compounding amount of the binder contg. in the nonphotosensitive intermediate layer contains >=100wt.% based on the binder content of the thermal developing photosensitive layer which contains less than the binder content of the another thermal developing photosensitive layer. The polyvinyl butyral, etc. is used as the binder. In the titled material, the hot solvent contg. in the nonphotosensitive intermediate layer is >=30wt.% based on the binder content of the nonphotosensitive intermediate layer. The hot solvent is a substance which is a solid or a semisolid at a normal temp. and dissolves and melts at the time of heating, and is exemplified by urea derivaties and amide derivatives, etc. Thus, the movement of a dye affording substance between the photosensitive layers is prevented by the nonphotosensitive intermediate layer, thereby lessening the color muddiness of the titled material. The density of the color image is improved, without injuring the movement of the coloring matter. |
