Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1997-05-28
1998-09-01
Huff, Mark F.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, 430603, 430631, 430966, G03C 104, G03C 516
Patent
active
058009760
ABSTRACT:
A dual-coated radiographic element is disclosed comprised of a blue tinted film support having coated on each of its faces a spectrally sensitized high bromide tabular grain emulsion. The properties of a maximum density of at least 3.0, an average contrast of at least 2.7, and a b* value more negative than -5.0 at a silver coating coverage on each major surface of the support of less than 12 mg/dm.sup.2, are imparted by (1) the support having a neutral density of at least 0.18, (2) tabular grains accounting for at least 90 percent of total grain projected area having a mean thickness of 0.2 micrometer or less and a coefficient of variation of equivalent circular diameter less than 20 percent, (3) a covering power enhancing compound containing at least one divalent sulfur atom adsorbed to surfaces of the silver halide grains, (4) a water soluble polymer chosen from the class consisting of polyacrylamide and dextran, in a weight ratio of the polymer to the gelatino-vehicle of at least 0.1:1, and (5) hardening of the gelatino-vehicle being chosen to allow a weight gain following processing and before drying of greater than 200 percent, based on the total weight of gelatino-vehicle.
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Research Disclosure, vol. 184, Aug. 1979, Item 18431 E.
Adin Anthony
Dickerson Robert E.
Hansen Marcia K.
Eastman Kodak Company
Huff Mark F.
Thomas Carl O.
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