Thermographic recording material with improved tone reproduction

Details Thermographic recording material with improved tone reproduction Thermographic recording material with improved tone reproduction

1996-12-26

1999-03-23

Knode, Marian C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430617, 430618, 430620, 430315, 430236, 503202, 503210, 503207, 503226, B41M 528, B41M 540, G03C 1494, G03C 1498

Patent

active

058857656

ABSTRACT:
A recording material for producing high contrast images comprising at least one thermosensitive element, comprising a layer comprising a substantially light-insensitive organic silver salt in at least one binder and in thermal working relationship therewith an organic reducing agent therefor, on a support, characterized in that the recording material is light-insensitive and the layer contains colloidal particles comprising silicon dioxide at a coating weight given by expression (1): ##EQU1## wherein B represents the total weight of all binders in the layer, AGOS represents the total weight of organic silver salt in the layer and S represents the weight of the colloidal particles in the layer; and wherein a protective layer is optionally applied to the thermosensitive element being thereby an outermost layer of the recording material.

REFERENCES:
patent: 4013473 (1977-03-01), Willems et al.
patent: 5489566 (1996-02-01), Dombrowski
patent: 5578548 (1996-11-01), Bjork et al.
patent: 5652195 (1997-07-01), Horsten et al.
Korczynski, Andrzej, et al., "Heat-sensitive paper for obtaining black-and-white reproductions," Radiation Chem., Photochem. 91:58 (1979) (Abstract only).
English abstract to French Patent Application No. 75 25962, published Mar. 19, 1976.

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