SILVER HALIDE PHOTOGRAPHIC SENSITIVE MATERIAL CONTAINING METHINE COMPOUND

PROBLEM TO BE SOLVED: To obtain a silver halide photographic sensitive material containing a hemicyanine dye or a streptocyanine dye having high photographic sensitivity by forming a silver halide emulsion layer containing a specified hemicyanine dye and a specified merocyanine dye. SOLUTION: The si...

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Bibliographische Detailangaben
Hauptverfasser: TAKEI HARUO, KATO TAKASHI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To obtain a silver halide photographic sensitive material containing a hemicyanine dye or a streptocyanine dye having high photographic sensitivity by forming a silver halide emulsion layer containing a specified hemicyanine dye and a specified merocyanine dye. SOLUTION: The silver halide photographic sensitive material has a silver halide emulsion layer containing at least one hemicyanine dye or streptocyanine dye and at least one merocyanine dye. The hemicyanine dye is a compound of the formula I and the merocyanine dye is a compound of formula II. In the formulae, Z1 and Z2 are each a 5- or 6-membered N-containing heterocycle, Z3 is a group of atoms required to form an acidic nucleus, R1-R4 are each alkyl, aryl or the like, M1-M8 are each methine, n1 and n2 are each 0 or 1, k1 and k2 are each 0-4, C1 and C2 are each an electric charge neutralizing ion and m1 and m2 are each a number required to neutralize electric charges.