Process for producing silver halide photographic material

Details Process for producing silver halide photographic material Process for producing silver halide photographic material

1990-07-19

1992-07-14

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430577, 430599, 430608, G03C 1015

Patent

active

051302128

ABSTRACT:
A process for producing a silver halide photographic material that has at least one silver halide emulsion layer on a support, in which process at least 10 mg of a calcium salt per mole of silver halide is added during the period from the completion of physical ripening a silver halide emulsion to the completion of its chemical ripening together with at least one compound represented by the following general formula (I) and at least one compound represented by the following general formula (II): ##STR1## where R.sub.1 is a hydrogen atom or an alkyl group; R.sub.2 and R.sub.3 which may be the same or different are each a substituted or unsubstituted alkyl group; A.sub.1 -A.sub.6 are each a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom or a phenyl group, provided that adjacent atoms or groups may combine to form a ring; X is an anion; and n is 0 or 1, provided that n =0 when an intramolecular salt is formed; ##STR2## wherein Z.sub.1 is the group of non-metallic atoms necessary to form a 5- or 6-membered hetero ring; Q is the group of non-metallic atoms necessary to form a 5-membered nitrogenous hetero ring; R.sub.4 is an alkyl group of a substituted alkyl group; and m is 1 or 2.

REFERENCES:
patent: 3759713 (1973-09-01), Florens et al.
patent: 3953216 (1976-04-01), Hinata et al.
patent: 4582786 (1986-04-01), Ikeda et al.

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