Gold plating solutions, creams and baths

Details Gold plating solutions, creams and baths Gold plating solutions, creams and baths

1987-12-08

1991-03-12

Barr, Josephine

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 126, 106 105, 106 3, C23C 300

Patent

active

049990543

ABSTRACT:
Non-toxic, non-electrolytic solutions, creams and immersion baths are provided for gold plating metallic items such as silver, copper, nickel, brass and gold alloys, as well as silver plated or gold plated items. Water soluble gold salts are used, together with reducing compounds. Water soluble gold salts can also be used with complexing compounds and stabilizers. For convenience, the gold plating ingredients may be combined with salts to form tablets or powders. Addition of water to the tablets or powder provides the novel solutions and immersion baths. The ingredients can also be reached with the metallic item in the presence of a metallic reaction enhancer. The amount of gold generating compound in the solutions and creams is selected to either replenish or maintain the amount of gold on an item which already has a gold surface.

REFERENCES:
patent: 3123484 (1964-03-01), Pokras
patent: 3506462 (1970-04-01), Oda
patent: 4270932 (1981-06-01), Perovetz et al.
patent: 4798626 (1989-01-01), Perovetz et al.

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