Photothermographic photosensitive material

Details Photothermographic photosensitive material Photothermographic photosensitive material

1997-04-24

1999-10-19

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430264, 430603, 430611, 430613, G03C 1498

Patent

active

059687258

ABSTRACT:
A photothermographic material comprising a photosensitive silver halide, an organic silver salt, a reducing agent, and an ultrahigh contrast promoting agent, typically a hydrazine derivative. In one embodiment, a compound having a group for promoting adsorption to the silver halide is contained for suppressing occurrence of pepper fog. In another embodiment, a 5- or 6-membered heterocyclic mercapto compound having at least two nitrogen atoms or a tetraazaindene compound is contained for suppressing a change of photographic properties, typically image enlargement with a variation of developing conditions. In either case, the photothermographic material can form super-high contrast images of quality.

REFERENCES:
patent: 4166742 (1979-09-01), Mifune et al.
patent: 4987052 (1991-01-01), Hirano et al.
patent: 5242791 (1993-09-01), Hirano et al.
patent: 5464738 (1995-11-01), Lynch et al.
patent: 5496695 (1996-03-01), Simpson et al.
patent: 5677121 (1997-10-01), Tsuzuki

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