Full color photothermographic imaging system
AssigneeMinnesota Mining and Manufacturing Company
InventorsAlan J. Herbert, Susan K. Jongewaard, David R. Whitcomb
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Abstract
Disclosed are photothermographic constructions containing at least a plurality of light-sensitive layers which are separated by barrier layers composed of a polymer, e.g., ethyl cellulose and polyethylene terephthalate, having an energy activation of permeability (E.sub.p) of less than about 30 kJ/mole. The barrier layers must be substantially insoluble in the light sensitive layers and vice versa. Each light sensitive layer contains a nitrate salt, leuco dye, binder, and optionally, a photoinitiator. The photothermographic construction is capable of effectively reproducing full color images.
Claims16
A photothermographic construction comprising a substrate coated thereon with at least two light-sensitive layers, wherein said light-sensitive layers comprise a nitrate salt, leuco dye, and a binder;
- and further wherein:
- (a) at least one pair of said light-sensitive layers is separated by a barrier layer comprising a polymer having an E.sub.p value of less than about 30 kJ/mole;
- and (b) said barrier layer and said light-sensitive layers are substantially insoluble in one another.
Dependencies are inferred from the claim text.