Photographic emulsions containing internally modified silver hal

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

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430569, 430596, 430604, 430605, 430606, 430612, G03C 106

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active

049371800

ABSTRACT:
Photographic emulsions are disclosed comprised of radiation sensitive silver bromide grains optionally containing iodide. The grains exhibit a face centered cubic crystal lattice structure and are formed in the presence of a hexacoordination complex of rhenium, ruthenium, or osmium with at least four cyanide ligands.

REFERENCES:
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patent: 3890154 (1975-06-01), Ohkubo et al.
patent: 4126472 (1978-11-01), Sakai et al.
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patent: 4643965 (1987-02-01), Kubota et al.
patent: 4835093 (1989-05-01), Janusonis et al.
Research Disclosure, vol. 176, Dec. 1978, Item 17643, Section IA.
D. M. Samoilovich, "The Influence of Rhodium and Other Polyvalent Ions on the Photographic Properties of Silver Halide Emulsions", in a paper presented to 1978 International Congress of Photographic Science, Rochester Institute of Technology, Aug. 20-26, 1978.
At the 1982 International Congress of Photographic Science at the University of Cambridge, R. S. Eachus presented a paper titled, "The Mechanism of IR.sup.3+ Sensitization of Silver Halide Materials".

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