Spectrally sensitized inner latent image type silver halide phot

Details Spectrally sensitized inner latent image type silver halide phot Spectrally sensitized inner latent image type silver halide phot

1983-10-27

1985-05-21

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430583, 430940, 430409, G03C 114

Patent

active

045186898

ABSTRACT:
An inner latent image type silver halide photographic emulsion which is spectrally sensitized by adding at least one monomethine cyanine dye represented by general formula (II) to a direct positive inner latent image type silver halide photographic emulsion and thereafter adding additionally at least one monomethine cyanine dye represented by general formula (I) to said emulsion ##STR1## (the symbols are as defined in the appended claims). A remarkable increase of spectral sensitivity, an increase of maximum density and a decrease of minimum density can be obtained by this silver halide photographic emulsion.

REFERENCES:
patent: 3953215 (1976-04-01), Hinata et al.
patent: 3976492 (1976-08-01), Hinata et al.
patent: 4040839 (1977-08-01), Matsuyama et al.

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