Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1991-08-22
1993-06-29
Baxter, Janet C.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430581, 430583, 430584, 430585, 430592, G03C 112, G03C 128
Patent
active
052233898
ABSTRACT:
Disclosed is a silver halide emulsion, which comprises at least one methine dye represented by the general formula (I): ##STR1## wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one carbon, nitrogen, sulfur or oxygen atom; l.sub.1 represents an integer 1 or 2; l.sub.2 represents an integer 0 or 1, l.sub.3 represents an integer from 1 to 4; and Ar represents an aromatic polycyclic group formed of 8 or more atoms containing at least one nitrogen atom, with the proviso that said nitrogen atom is in a form such that tautomerism does not produce ##STR2## A silver halide photographic material is also disclosed which comprises on a support a silver halide photographic emulsion layer comprising silver halide grains containing iron ions and having a localized phase with a high iron ion concentration and at least one methine dye represented by general formula (I') and which exhibits a blue sensitivity difference of 0.1 or less between when it is developed after exposure in vacuo under 10.sup.-5 torr and when it is developed after exposure in air under 760 torr: ##STR3## wherein MET, Q, l.sub.1, l.sub.2, and l.sub.3 are as defined for formula I and Ar' represents an aromatic polycyclic group formed of 8 or more atoms.
REFERENCES:
patent: 4987064 (1991-01-01), Saitou et al.
patent: 5032500 (1991-07-01), Ikeda et al.
Hioki Takanori
Matsunaga Atsushi
Baxter Janet C.
Fuji Photo Film Co. , Ltd.
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