Process for preparing a silver halide emulsion
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United States of America Patent
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Jun 1, 1993
Grant Date -
N/A
app pub date -
Feb 10, 1992
filing date -
Feb 16, 1991
priority date (Note) -
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Abstract
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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