Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1992-03-12
1993-10-12
Baxter, Janet C.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430567, 430569, 430637, 430966, G03C 1035, G03C 146
Patent
active
052524426
ABSTRACT:
A radiographic element is disclosed comprised of a film support capable of transmitting radiation to which the radiographic element is responsive having opposed major surfaces, and, coated on the opposed major surfaces, spectrally sensitized high tabularity tabular grain emulsion layer units, and, interposed between each of the emulsion layer units and the support, means for absorbing radiation to which said emulsion layer units are responsive. The emulsion layer units exhibit a coefficient of variation of less than 15 percent, based on the total grain population having an equivalent circular diameter of greater than 0.1 .mu.m, and greater than 97 percent of the projected area of grains having an equivalent circular diameter of greater than 0.1 .mu.m is accounted for by tabular grains having a mean thickness of less than 0.3 .mu.m and a halide content of from 0 to 5 mole percent chloride, from 0 to 5 mole percent iodide, and from 90 to 100 mole percent bromide, based on total silver.
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Research Disclosure, vol. 232, Aug. 1983, Item 23212 (Mignot French Patent 2,534,036 corresponding).
Dickerson Robert E.
Tsaur Allen K.
Baxter Janet C.
Eastman Kodak Company
Thomas Carl O.
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