Coloring a gold alloy

Details Coloring a gold alloy Coloring a gold alloy

1990-04-17

1991-10-22

Dean, R.

Metal treatment

Compositions

Heat treating

148 131, 148430, 420512, C21D 144, C22C 502

Patent

active

050592556

ABSTRACT:
A gold alloy comprises at least gold, iron and nickel, the gold being present in an amount between about 74.4 and 94.5 percent by weight of the alloy, the iron being present in an amount between about 5.0 and 25.0 percent by weight of the alloy, and the nickel being present in an amount between about 0.5 to about 0.6 percent by weight of the alloy. Heat treatment of the alloy causes a visually observable blue coloration.

REFERENCES:
patent: 660983 (1900-10-01), Conner et al.
patent: 1580443 (1926-04-01), Shields
patent: 2576738 (1951-11-01), Williams
patent: 4820487 (1989-04-01), Antoniazzi

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