| 摘要 |
PURPOSE:To prevent the deterioration of bleach-accelerating effect, even in a running state by incorporating a specified coupler capable of being released a bleach-accelerating agent in the photosensitive material. CONSTITUTION:The coupler capable of being released the bleach-accelerating agent shown by formula I is incorporated in the photosensitive material. In formula I, A is a coupler residual group, LINK is a bonding group, (n) is 0 or 1, X is oxygen or sulfur atom., etc., B<1> and B<2> are each alkylene or arylene group which may be substd., etc., (m) is an integer of 0-6, Z is an unsatd. heterocyclicring group which may be substd. The coupling is incorporated in an emulsion layer and a nonphotosensitive intermediate layer. When a large amount of the coupler is incorporated in the layers respectively, when the coupler is incorporated in the nonphotosensitive intermediate layer, the side effect such as the deterioration of photosensitivity is reduced. Thus, the bleach- accelerating effect of the coupler in the actual running state is sufficiently obtd. |
