Silver halide photosensitive materials containing thiourea and a

Details Silver halide photosensitive materials containing thiourea and a Silver halide photosensitive materials containing thiourea and a

1987-03-23

1988-06-07

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, 430566, 430603, 430671, G03C 102

Patent

active

047496460

ABSTRACT:
A photographic silver halide emulsion comprising a 1,1,3,3-tetrasubstituted middle chalcogen urea compound is described wherein at least one substituent comprises an acid function. The urea compound is an effective silver halide grain growth-modifying agent. A process for modifying the grain growth of silver halide is also described.

REFERENCES:
patent: 3598598 (1971-08-01), Herz
patent: 4221863 (1980-09-01), Overman et al.
patent: 4266018 (1981-05-01), Ishiguro et al.
patent: 4284717 (1981-08-01), Toya et al.
patent: 4629678 (1986-12-01), Murai
patent: 4678745 (1987-07-01), Yamada et al.
"Particle Growth in Suspension", Academic Press, London, 1973, p. 159, Oppenheimer et al.

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