Method for preparation of photographic silver halide emulsions a

Details Method for preparation of photographic silver halide emulsions a Method for preparation of photographic silver halide emulsions a

1989-06-01

1991-07-09

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, 430599, 430607, 430609, G03C 1005

Patent

active

050305522

ABSTRACT:
The present invention provides (1) a method for preparation of a photographic silver halide emulsion containing tabular silver halide particles having a particle diameter larger than the particle thickness by three times or more, wherein least one oxidizing agent selected from a hydrogen peroxide, a salt of a peroxy acid and an ozone is added to the emulsion before the termination of chemical ripening thereof and then a reducing agent is added thereto, and (2) a silver halide photographic material which has at least one or more layers comprising a tabular silver halide particle-containing emulsion wherein tabular silver halide particles are those prepared by method (1). The present tabular silver halide particle-containing emulsion has high sensitivity and good granularity and is substantially free from fog.

REFERENCES:
patent: 3957490 (1976-05-01), Libeer et al.
patent: 4329417 (1982-05-01), Nagatani et al.
patent: 4399215 (1983-08-01), Wey
patent: 4665012 (1987-05-01), Sugimoto et al.
patent: 4665017 (1987-05-01), Mifune et al.
patent: 4678745 (1987-07-01), Yamada et al.
patent: 4681838 (1987-07-01), Mifune et al.

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