Direct-positive photographic silver halide emulsion containing n

Details Direct-positive photographic silver halide emulsion containing n Direct-positive photographic silver halide emulsion containing n

1977-02-17

1978-06-27

Louie, Jr., Won H.

Gas separation: apparatus

Solid sorbent apparatus

Plural solid sorbent beds

96101, 96107, 542434, G03C 116, G03C 128

Patent

active

040972852

ABSTRACT:
A direct-positive photographic silver halide emulsion which is spectrally sensitized with a cyanine dye in which the position 2 or 4 of a 1,8-naphthyridine ring is joined through the position 2 of a thiazole ring through a methine linkage is disclosed. Said emulsion has no decreasing tendency of the maximum density and shows no color stain due to the remains of the dye. Photographic elements employing such emulsion are also disclosed.

REFERENCES:
patent: 1942854 (1934-01-01), Brooker
patent: 3865596 (1975-02-01), Furuya et al.
patent: 3925085 (1975-12-01), Sato et al.

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