Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1994-01-21
1995-01-24
Chea, Thorl
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430202, 430203, 430264, 430271, 430273, 430915, 430916, G03L 1498
Patent
active
053842383
ABSTRACT:
Positive-acting photothermographic elements suitable for use at contact speeds comprising a base layer having at least two layers thereon, which layers define a photosensitive medium comprising a photocurable composition, a reducible silver source, and a reducing system for silver ion comprising one or more components including a compound capable of reducing silver ion to silver metal, such that the reducible silver source and at least one component of the reducing system for silver ion are present in separate layers, wherein exposure of the element to actinic radiation causes curing of the photocurable composition in the exposed area(s), said curing preventing the reducing system from interacting with the reducible silver source during thermal processing and in which the photocurable composition comprises a free radical curable resin and a photoinitiator therefor having an absorbance to radiation in the wavelength range of 340 to 440 nm, which photoinitiator upon exposure to said actinic radiation or during subsequent thermal processing undergoes a loss of absorption in said wavelength range 340 to 440 nm.
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Ellis Richard J.
Nairne Robert J. D.
Patel Ranjan C.
Chea Thorl
Evearitt Gregory A.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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