Silver halide photographic emulsion containing a specific dye-gr

Details Silver halide photographic emulsion containing a specific dye-gr Silver halide photographic emulsion containing a specific dye-gr

1994-04-29

1995-01-03

Baxter, Janet C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430574, G03C 1005, G03C 1494

Patent

active

053785975

ABSTRACT:
Disclosed is a photographic silver halide emulsion comprising a tabular silver halide grains having at least two twin crystal planes, at least one of an unsymmetrical cyanine represented by Formula I, at least one of a symmetrical cyanine represented by Formula II-(a), and at least one of a symmetrical cyanine represented by Formula II-(b); ##STR1## wherein Z.sub.1 and Z.sub.2 each represents a group of atoms necessary to form a naphthoxazole ring, a naphthoimidazole ring, a naphthoselenazole ring, a benzoxazole ring, a benzothiazole ring, a benzimidazole ring, a benzselenazole ring, Z.sub.1 and Z.sub.2 are not the same as each other, a heterocyclic ring formed by Z.sub.1, Z.sub.2 may have a substituent; R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each represents an unsubstituted alkyl group or a substituted alkyl group; m represents an integer of 0 to 2, L.sub.1 to L.sub.9 each represents a methine group or a substituted group; X.sub.1, X.sub.2 and X.sub.3 each represent a charge-balancing counter ion; n.sub.1, n.sub.2 and n.sub.3 each represent an integer larger than 0 and necessary to neutralize the change of the whole molecule.

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