Chemistry: electrical and wave energy – Processes and products
Patent
1980-12-19
1982-08-10
Tufariello, T.
Chemistry: electrical and wave energy
Processes and products
204 8, 204 37R, 204 43G, C25D 120, C25D 362, C25D 550
Patent
active
043436846
ABSTRACT:
The method of achieving a karat gold electroform includes the steps of forming an easily workable, substrate to a desired configuration and then applying an electrically conductive surface treatment if necessary. The configured, treated substrate is electroplated in a metallic bath until a self-supporting metallic shell is formed over the substrate. In known manner, the substrate is removed. The metallic shell is cleaned and then placed in a karat gold electroforming bath wherein a gold piece is built to the desired final thickness and karat by controlling current density and the plating time. The karat gold electroformed piece can be stress relieved by annealing at elevated temperatures for suitable periods of time and is then immersed in an acid bath to remove the metallic shell from the piece interior, thereby producing a configured shell of karat gold.
REFERENCES:
patent: 2719821 (1955-10-01), Campana
patent: 3749650 (1973-07-01), Dettke
patent: 3953246 (1976-04-01), Wilson
Plating, Mar. 1975.
Metal Finishing, Feb. 1956, pp. 52-56.
Zhurnal Prikladnoi Khimii,vol.50, No. 12, pp. 2698-2701, Dec. 1977.
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Contemporary Jewelry by Philip Morton, Holt, Rinehart and Winston, Inc., 1970, pp. 166-169.
Contemporary Jewelry by Philip Morton, Holt, Rinehart and Winston, 1976, FIGS. 454-468.
Metal Finishing, Jan. 1979, vol. 77, No. 13, pp. 432-440.
Jewelers' Circular-Keystone, Nov. 1980, pp. 63-76, article _entitled "Metalcrafting, Creating Tomorrow's Designs".
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