Antifoggants in heat developable photographic materials

Details Antifoggants in heat developable photographic materials Antifoggants in heat developable photographic materials

1978-04-03

1979-01-30

Schilling, Richard L.

Gas separation: apparatus

Electric field separation apparatus

And serially arranged nonelectrical separator

96100R, 96109, 961141, G03C 700, G03C 140, G03C 102, G03C 134

Patent

active

041370791

ABSTRACT:
A heat developable photographic material for producing a dye enhanced silver image comprising, in binder, in reactive association, (a) photosensitive silver halide, (b) a dye-forming coupler, (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent, with (ii) an organic reducing agent which in its oxidized form forms a dye with the dye-forming coupler, and (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole antifoggant, provides developed, dye enhanced silver images with reduced fog upon processing. An image can be developed in this photographic material by merely heating the material. Other addenda employed in heat developable photographic materials, such as sensitizing dyes, can be useful with the described photographic materials.

REFERENCES:
patent: 2403927 (1946-07-01), Kendall et al.
patent: 3307948 (1967-03-01), Thiers et al.
patent: 3457075 (1969-07-01), Morgan et al.
patent: 3531286 (1970-09-01), Renfrew
patent: 3637393 (1972-01-01), Sakamoto et al.
patent: 3666477 (1972-05-01), Goffe
patent: 3761270 (1973-09-01), DEMauriac et al.
patent: 3764328 (1973-10-01), Birkeland
patent: 3832186 (1974-08-01), Masuda et al.
patent: 3997346 (1976-12-01), Masuda et al.
patent: 4002479 (1977-01-01), Suzuki et al.
"Heat Developable...Process" Knight et al., Research Disclosure No. 15869, 6/1977, pp. 80 & 81.
"Heat Developable...Process" deMauriac, Research Disclosure No. 15026, 10/1976, pp. 18-21.
Derwent Abstract No. 72805x.
Product Licensing Index, No. 9232, 12/1971, pp. 107-110.

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