Photographic products and processes employing novel nondiffusibl

Details Photographic products and processes employing novel nondiffusibl Photographic products and processes employing novel nondiffusibl

1978-07-24

1979-08-28

Schilling, Richard L.

Gas separation: apparatus

Solid sorbent apparatus

Soluble or deliquescent type

96 84R, 96112, 260146D, 260147, 260154, 260156, 260163, G03C 184, C09B 4500, C09B 2922, C09B 2936

Patent

active

041659872

ABSTRACT:
Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a releasable pyridylazopyrazole or pyrimidylazopyrazole dye moiety. The compound contains in the ortho position of the azopyrazole moiety a metal chelating group, a salt thereof or a hydrolyzable precursor thereof, and a ballasted carrier moiety which is capable of releasing the diffusible azo dye under alkaline conditions. The dye is transferred imagewise to an image-receiving layer where it is contacted with metal ions to form a metal-complexed azo dye transfer image of excellent stability.

REFERENCES:
patent: 3860571 (1975-01-01), Ramanathan

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