Silver halide photographic emulsion

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

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Details

430606, G03C 136

Patent

active

046668276

ABSTRACT:
Disclosed is a negative fine grain silver halide photographic emulsion capable of afford hard tone and high D.sub.max and have a markedly higher sensitivity than convertional roomlight handlable light-sensitive materials and free from defects such as fogging and decrease in sensitivity under roomlight conditions. This emulsion contains at least 70 mol % of silver chloride and an organic desensitizer which has an anodic polarographic potential and a cathodic polarographic potential which when added together give a positive sum, the amount of said organic desensitizer being such that necessary to reduce the sensitivity of said emulsion by not more than log E=1.3 (log E=1.0 in the case of silver chloride). This emulsion may further contain a rhodium salt.

REFERENCES:
patent: 3326687 (1967-06-01), Kalenda
patent: 3628958 (1971-12-01), Haefner
patent: 3671254 (1972-06-01), Dostes
patent: 4452882 (1984-06-01), Akimura et al.
patent: 4472497 (1984-09-01), Kitchin et al.

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