| 摘要 |
PURPOSE:To obtain the titled material capable of releasing a photographic useful reagent with a prescribed timing at the time of processing, and of producing easily and inexpensibly, preventing the desensitizing and the generation of fog by incorporating one kind of specific photographic reagent to the titled material. CONSTITUTION:At least one kind of the photographic reagents shown by the formula is incorporated to the titled material having at least one layer of the photosensitive silver halide emulsion layer. In the R<1> and R<2> are each hydrogen atom or alkyl group, etc., R<3> and R<4> are each cycloalkyl group, etc., R<5> is hydrogen atom or acyl group, X is oxygen atom, etc., (time) is a timing group, (t) is 0 or 1, PUG is a photographic useful group. The preferable used amount of a photographic reagent shown by the formula is 10<-8>-10<-1>mol of an anti- fogging agent and a development stopping agent per 1mol of silver. |
