Silver iodide fine grain emulsion, lightsensitive silver halide emulsion including the same and silver halide photographic lightsensitive material containing the lightsensitive silver halide emulsion
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United States of America Patent
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Sep 21, 1999
Grant Date -
N/A
app pub date -
Jul 9, 1998
filing date -
Jul 11, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A silver iodide fine grain emulsion comprising a dispersion medium and fine grains of silver iodide has an average grain size of 0.02 to 0.07 .mu.m, contains 0.6 mol or more of silver iodide per liter thereof in a dissolved state at 40.degree. C., and has an electric conductivity of 4,500 to 15,000 .mu.S/cm in a dissolved state at 40.degree. C. A lightsensitive silver halide emulsion produced by using the above silver iodide fine grain emulsion is also disclosed. A silver halide photographic lightsensitive material comprising a support and, superimposed thereon, at least one lightsensitive silver halide emulsion layer in which the above lightsensitive silver halide emulsion is contained, is also disclosed.
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