Silver halide crystals with two surface types

Details Silver halide crystals with two surface types Silver halide crystals with two surface types

1980-06-16

1985-01-29

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430567, 430596, 430603, 430605, G03C 128, G03C 102

Patent

active

044966520

ABSTRACT:
Novel silver halide crystals useful for both negative and positive photographic elements are produced by balanced double jet precipitation. Using that process, silver halide adds preferentially to the (111) surfaces of tetradecahedral silver bromide or iodobromide crystals to form cubic crystals which have corners containing a different silver halide from that in the lateral surfaces. In a specific embodiment, a crystal has corners composed of silver bromochloride, while the crystal substrate consists of highly photosensitive silver iodobromide.

REFERENCES:
patent: 3736144 (1973-05-01), Nagae et al.
patent: 3957488 (1976-06-01), Klotzer et al.
E. Moisar, et al.--The Influence of Growth Conditions on Crystalline Behavior of Silver Halide, Bunsengesellschaft fur Physikalische Chemie, Berichte 67, pp. 949-957.
S. Suzuki, et al.: Imaging Materials and System S Paper B-1 SPSE Tokyo Symposium, 1973.
Shiozawa, "Electron Microscopic Study on Conversion of Silver Halides. II Conversion of AgBr to Agcl and Agcl to AgBr," Bull. Soc. Photog. Sci. & Technology of Japan, No. 22, Dec. 1972, pp. 14-20.

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