Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1992-03-25
1993-05-18
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430503, 430505, 430556, 430581, 430583, 430609, 430611, 430629, G03C 109, G03C 112
Patent
active
052120562
ABSTRACT:
A multilayer silver halide color photographic element comprising at least one blue-sensitive silver halide emulsion layer comprising a blue spectral sensitizing dye and a supersensitizing amount of a disulfide compound of formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, equal or different, each represents a hydrogen atom or a lower alkyl group, R.sub.5 represents a hydrogen atom, a formyl group or an acetyl group, R.sub.6 and R.sub.7, equal or different, each represents a hydrogen atom or a lower alkyl group, or R.sub.6 and R.sub.7 represent the elements needed to complete an unsaturated cyclic nucleus.
The combination provides a blue-sensitive silver halide emulsion layer having high sensitivity, low fog and good resistance against fading of the latent image.
REFERENCES:
patent: 3954478 (1976-05-01), Arai et al.
patent: 4374196 (1983-02-01), Herz
patent: 4423140 (1983-12-01), Herz
patent: 4780400 (1988-10-01), Beltramini et al.
Beltramini Walter
Delprato Ivano
Bowers Jr. Charles L.
Chea Thorl
Griswold Gary L.
Kirn Walter N.
Litman Mark A.
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