Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1996-03-29
1998-01-20
Ruff, Mark F.
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430567, G03C 7407, G03C 1035
Patent
active
057099812
ABSTRACT:
The invention relates to a light sensitive photographic element comprising a support, and chemically and spectrally sensitized emulsions (A) and (B), wherein:
emulsion (A) comprises a tabular silver halide emulsion population comprised of at least 50 mole percent chloride, based on silver, wherein at least 50 percent of the grain population projected area is accounted for by tabular grains bounded by {111} major faces, each having an aspect ratio of at least 2 and each being comprised of a core and a surrounding band containing a higher level of bromide or iodide ion than is present in said core, said band containing up to about 30 percent of the silver in the tabular grain;
wherein said emulsion (A) has been precipitated in the presence of an organic grain growth modifier or surface stabilizer and wherein said organic grain growth modifier or surface stabilizer has been substantially removed from said emulsion (A) after the formation of said band; and
emulsion (B) comprises at least 50 mole percent chloride, based on silver, and is bounded by {100} major faces.
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Eastman Kodak Company
Leipold Paul A.
Ruff Mark F.
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