Photographic element containing a photoreducible salt of an aryl

Details Photographic element containing a photoreducible salt of an aryl Photographic element containing a photoreducible salt of an aryl

1974-09-26

1976-05-18

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 48QP, 96 76R, 96 90R, 260308D, G03C 524, G03C 152

Patent

active

039575144

ABSTRACT:
An imaging element and process wherein a tetrazolium cation, which is present in combination with a reducing anion as a salt, is imagewise exposed and reduced by the anion to form a formazan dye, without the need for a separate photoreductant. Stabilization of the resulting dye and fixing of the element can be achieved by the introduction into the element of a salt of a metal.

REFERENCES:
patent: 2713581 (1955-07-01), Pannone et al.
patent: 2915392 (1959-12-01), Pedersen

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