Silver halide photosensitive material

Abstract

Abstract PURPOSE:To prevent action on silver halide prior to development and air oxidation, and to enable adjustment of a timing of releasing necessary compds. at the time of development by incorporating the precursor of 3-pyrazolidone derivative. CONSTITUTION:A photographic constitutent layer formed on a support incorporates a precursor of 3-pyrazolidone derivs., such as formulae II and III, having general formula I in which A is an aliphatic or aromatic group; R1, R2 are each H or 1-5C alkyl optionally substd. by alkoxy, halogen, acyloxy, alkoxyacyloxy, or carbamoyl; R3 is H or aryl; and R4 is aryl. Addition of said 3-pyrazolidone derivs. has an effect of accelerating development as has been known widely, but it is difficult to incorporate it in the photosensitive material, because it is easy to be attacked by air oxidation and ready to diffuse. The use of said precursor enables adjustment of a timing of releasing said necessary compd. at the time of development.

Inventors

• 👤 Hidetoshi Kobayashi
• 👤 英俊 小林
• 👤 Yasushi Ichijima
• 👤 市島　靖司
• 👤 Isamu Ito
• 👤 勇 伊藤
• 👤 Keiji Obayashi
• 👤 慶司 御林

Bibliographic Details