Fogged, direct-positive silver halide emulsion containing carboc

Details Fogged, direct-positive silver halide emulsion containing carboc Fogged, direct-positive silver halide emulsion containing carboc

1973-07-06

1976-07-20

Louie, Jr., Won H.

Gas separation: apparatus

Chromatography type apparatus

96107, 96135, 96137, 96138, G03C 128, G03C 136, G03C 108

Patent

active

039704610

ABSTRACT:
A direct positive silver halide photographic emulsion containing a dye represented by the following general formula: ##SPC1##
Wherein R and R.sub.1 are selected from the first group consisting of alkyl, allyl, substituted alkyl, aryl, and substituted aryl groups, at least one of the R and R.sub.1 being an alkyl group substituted with a carboxyl or sulfo radical; R.sub.2 and R.sub.3 are selected from the second group consisting of alkyl, aralkyl and allyl groups; L.sub.1 is selected from the third group consisting of methine and an atomic group capable of combining with R.sub.1, R.sub.2 or R.sub.3 to form a ring; L.sub.2 is methine; L.sub.3 is selected from the fourth group consisting of methine and an atomic group capable of forming a ring with R.sub.1 or a 3,3-substituent of an indolenine ring at the site near to L.sub.3, L.sub.3, such that a ring may be formed by L.sub.1 and L.sub.3 ; x is an anion; n and m are the integers 1 and 2, respectively, such that when said dye forms in intramolecular salt, m is 1; Z is an atomic group capable of completing a benzene ring or a naphthalene ring; and Z.sub.1, is a non-metallic atomic group capable of completing a 5- or 6- member heterocyclic ring.

REFERENCES:
patent: 3367778 (1970-03-01), Berriman
patent: 3501311 (1970-03-01), Lincoln et al.
patent: 3615643 (1971-10-01), Shiba et al.
patent: 3660102 (1972-05-01), Riester
patent: 3660103 (1970-05-01), Kampfer et al.
patent: 3782957 (1974-01-01), Ohkubo et al.

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