| 摘要 |
A photographic material suited for the production of (an) azine dye image(s), and having at least one silver halide emulsion layer and/or a separate layer in water-permeable relationship with such an emulsion layer which contains: (1) a heterocyclic hydrazone compound, (2) a phenol, naphthol or active methylene coupler compound capable of forming on oxidative coupling with compound (1) an azine dye, (3) an electron transfer agent or ETA-compound capable of forming a positively charged semiquinone on oxidation with exposed silver halide, (4) a reducing agent capable of reducing the thus-formed semiquinone in acidic medium, and having in the pH range of 2-5, a polarographic half-wave potential (E 1/2) which is at least 40 mV more negative (according to the European Convention) than the polarographic half-wave potential of the ETA-compound in the same pH range, said material being suited for processing with a simple aqueous alkaline liquid, and (5) an acidic medium.
|
