G - Physics – 03 – C
Patent
G - Physics
03
C
96/100
G03C 1/005 (2006.01) G03C 1/07 (2006.01)
Patent
CA 1175693
-.alpha. - SILVER CHLORIDE EMULSIONS OF MODIFIED CRYSTAL HABIT AND PROCESSES FOR THEIR PREPARATION Abstract of the Disclosure Radiation-sensitive photographic emulsions are disclosed comprised of a dispersing medium and silver halide grains the halide content of which 1 at least 50 mole percent chloride, based on silver. The silver halide grains include tabular grains having a thickness of less than 0.5 micron, a diameter of at least 0.6 micron, and an average aspect ratio greater than 8:1 which account for at least 50 percent of the total projected area of the silver halide grains. The tabular grains have two opposed substantially parallel major crystal faces lying in {111} crystal planes and exhibiting at least one of the following features: (1) at least one peripheral edge lying parallel to a <211> crystallographic vector lying in the plane of one of the major faces and (2) bromide and/or iodide incor- porated in a central grain region. The tabular grains are formed in the presence of an aminoaza- indene and a peptizer having a thioether linkage.
415277
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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