| 摘要 |
PURPOSE:To obtain the colored image having a low min. concn. and a high max. concn. by incorporating a specific compd. to the title material, thereby improving a photosensitivity and restraining a fog-generation, while accelerating a development. CONSTITUTION:The title material is prepared by providing a photosensitive silver halide, a binder and a substance affording a coloring matter by forming or releasing a movable dyestuff accommodating or adversely accommodating with a reaction of reducing the photosensitive silver halide to a metal silver at the high temp. as essential components on a substrate, and by incorporating at least one kind of the compd. shown by the formula R1-S-R2 wherein R1 and R2 are each (unsubstd.) substd. aliphatic, aromatic or heterocyclic group, R1 and R2 together with S atom may be formed a 5-7 membered ring to the title material. The prescribed compd. may be preferably added to the photosensitive layer. However, the compd. may be added to the color fixing element in the state of contacting the color fixing element with the photosensitive element in the heat development. The prescribed photosensitive material may be developed for a short period, and the obtd. colored image gives a vivid image, and the stable development may be obtd. even if the developing condi tion is changed. |
