Silver bromoiodide core-shell grain emulsion
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United States of America Patent
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Nov 9, 2004
Grant Date -
Aug 5, 2004
app pub date -
Jul 25, 2003
filing date -
Jul 29, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a light-sensitive emulsion, and a light-sensitive photographic material containing the same, comprising silver bromoiodide grains of a core shell structure comprising: a) an inner core consisting essentially of silver bromide or silver bromoiodide and having a silver iodide content within the range of 0 to 10 mole %, and b) a plurality of shells consisting essentially of silver bromide or silver bromoiodide, wherein said silver bromoiodide grains exhibit an average grain size lower than 0.60 micrometer, an average grain thickness lower than 0.15 micrometer, and an average aspect ratio lower than 5:1.
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