Direct-positive super-sensitized silver halide emulsions

Details Direct-positive super-sensitized silver halide emulsions Direct-positive super-sensitized silver halide emulsions

1974-01-11

1976-09-14

Brown, J. Travis

Gas separation: apparatus

Chromatography type apparatus

96100, 96126, 96129, 96137, G03C 136

Patent

active

039804810

ABSTRACT:
Direct-positive silver halide emulsions comprising fogged silver halide grains and an electron acceptor are described wherein the emulsion is spectrally sensitized by means of 2-aryl-indolocarbocyanines. The combination of electron acceptors and these spectral sensitizers provides super-sensitizing effects that are not impaired by the presence of color couplers.

REFERENCES:
patent: 3501310 (1970-03-01), Illingsworth et al.
patent: 3567456 (1971-03-01), Riester et al.
patent: 3598596 (1971-08-01), Chapman
patent: 3615610 (1971-10-01), Florens et al.
patent: 3779776 (1973-12-01), Vanassche et al.

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