Process for the preparation of silver dispersions for filter lay

Details Process for the preparation of silver dispersions for filter lay Process for the preparation of silver dispersions for filter lay

1976-12-21

1978-06-13

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

96 84R, 106 119, 252300, B01J 1300, G03C 184

Patent

active

040948110

ABSTRACT:
The process for the preparation of silver dispersions for antihalation and filter layers in photographic material by reducing silver salts in the presence of a heterocyclic 5-membered or 6-membered compound which has a ##STR1## group in its 1,2,3-position and a 2-aminoalkyl or 2-hydroxyalkyl group or an alkylene chain which is linked through the 1- and 2-position. The process provides neutral grey silver dispersions without using cadmium salts, for the reduction of the silver salts.

REFERENCES:
patent: 2688601 (1954-09-01), Herz
patent: 3655412 (1972-04-01), Kumai et al.
patent: 3674703 (1972-07-01), Moll et al.
patent: 3972890 (1976-08-01), Botta

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