| 摘要 |
PROBLEM TO BE SOLVED: To obtain a silver halide photographic sensitive material high in sensitivity by incorporating a complex having a function of extending the existence time of photoelectrons generated by exposure longer than the case containing specified complex alone, in an emulsion. SOLUTION: A cyano-complex 2 having a function of extending the existence time of photoelectrons generated by exposure longer than the case containing cyano-complex 1 alone is contained into an emulsion together with the cyano- complex 1 represented by formula. In the formula, M is an optional metal atom, L is an optional ligand, (x) is 3, 4, 5 or 6 and (n) is -4, -3, -2 or -1. When the emulsion is doped with the cyano-complex having CN ions as ligands (cyano-complex 1) and further, doped with the second complex (cyano-complex 2), the photoelectron existence time si extended longer than the emulsion doped with the complex 1 alone and the further increase in photographic sensitivity is brought.
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