Method for applying metallic silver to a substrate

Details Method for applying metallic silver to a substrate Method for applying metallic silver to a substrate

1974-10-09

1976-09-28

Kendall, Ralph S.

Coating processes

Optical element produced

Transparent base

427165, 427168, 427424, 427426, 106 1, C23C 302

Patent

active

039832660

ABSTRACT:
High efficiency deposition of silver on the surface of a substrate is obtained by providing a solution containing reducible dissolved silver in the presence of an alkali metal hydroxide and ammonia, all of which are applied to the substrate in the presence of an aqueous solution of a moderating reducer containing a polyhydric alcohol of the formula CH.sub.2 OH(CHOH).sub.n CH.sub.2 OH, where n is an integer from 1 to 6. Preferably the polyhydric alcohol is sorbitol, and in a preferred embodiment a moderator is the form of a thio glycerol is present.

REFERENCES:
patent: 2996406 (1961-08-01), Weinrich
patent: 3772078 (1973-11-01), Polichette et al.
patent: 3776740 (1973-12-01), Siverz et al.
Ivanov et al., Chem. Abs. 43:2548c, 1949.

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