Patent ID: 6686117
Filing Date: 2004-02-03
Classification: G03C,Y10S

Abstract:
A radiographic silver halide film comprising a support having first and second major surfaces,said radiographic silver halide film having disposed on said first major support surface, one or more hydrophilic colloid layers including a first silver halide emulsion layer, and on the second major support surface, one or more hydrophilic colloid layers including a second silver halide emulsion layer, said first silver halide emulsion layer comprising a blend of silver halide grains, said blend comprising: blue-sensitive tabular silver halide grains that have an aspect ratio of at least 15, a grain thickness of at least 0.1 &mgr;m, and comprise at least 90 mol % bromide and up to 4 mol % iodide, based on total silver halide, substantially all of said iodide being present in an internal localized portion of said blue-sensitive tabular silver halide grains that excludes the surface of said blue-sensitive tabular silver halide grains, and green-sensitive tabular silver halide grains that have an aspect ratio of at least 20, a grain thickness of at least 0.07 &mgr;m, and comprise at least 90 mol % bromide, up to 1.5 mol % chloride, and up to 1.5 mol % iodide, based on total silver halide, wherein the molar ratio of silver in said blue-sensitive tabular silver halide grains to the silver in said green-sensitive tabular silver halide grains is from about 2:1 to about 6:1, wherein said blue-sensitive and green-sensitive tabular silver halide grains in said first silver halide emulsion layer are dispersed in a hydrophilic polymeric vehicle mixture comprising at least 0.5% of oxidized gelatin, based on the total dry weight of said polymeric vehicle mixture.