Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1983-10-27
1986-02-18
Louie, Won H.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430574, 430409, 430940, 430598, G03C 102, G03C 108
Patent
active
045713804
ABSTRACT:
An inner latent image type silver halide photographic emulsion which is spectrally sensitized by adding at least one 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 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: 3580724 (1971-05-01), Sato et al.
patent: 3772030 (1973-11-01), Gilman et al.
patent: 4040839 (1977-08-01), Matsuyama et al.
patent: 4362813 (1982-12-01), Mihara et al.
Mihara Yuji
Noguchi Yasuhiro
Fuji Photo Film Co. , Ltd.
Louie Won H.
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