Konica Corporation

Harumi Asakawa

Toshihiko Yagi

Noriki Tachibana

Shin-ichi Yamamoto

Tetuya Suzuki

A silver halide photographic emulsion containing silver halide twinned-crystal grains is prepared by the steps of (a) forming silver halide nuclear grains by mixing a water soluble silver salt and a water soluble halide, (b) forming silver halide seed-emulsion grains by carrying out ripening of the nuclear grains formed in (a), and (c) growing the seed-emulsion grains, wherein a water soluble polymer is introduced by (b), having the repetition unit represented by the following formula [P] in an amount of 10 to 100 mol % per each polymer molecule: ##STR1##

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Hino, Japan

Harumi Asakawa