Photographic elements with J-aggregating dicarbocyanine infrared

Details Photographic elements with J-aggregating dicarbocyanine infrared Photographic elements with J-aggregating dicarbocyanine infrared

1995-07-13

1996-11-19

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430599, 430601, 430603, 430604, 430605, 430567, 430944, G03C 120, G03C 109

Patent

active

055761739

ABSTRACT:
A silver halide photographic element comprising a silver halide emulsion layer sensitized with a sensitizing dye of formula (I) which provides a maximum sensitivity at greater than 700 nm and which emulsion layer has substantially no dye deaggregating compound therein: ##STR1## wherein: X.sub.1 and X.sub.2 are independently sulfur, selenium or oxygen provided that X.sub.1 and X.sub.2 are not both oxygen and either benzo ring may be substituted or unsubstituted;

REFERENCES:
patent: 5290675 (1994-03-01), Hioki et al.
patent: 5296343 (1994-03-01), Hioki et al.
patent: 5388657 (1994-08-01), Kato et al.

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