Coin cleaner

Details Coin cleaner Coin cleaner

1975-06-06

1976-12-14

Powell, William A.

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 3, 134 29, 134 30, 134 41, 252142, B08B 3000, C11D 708, C23G 102

Patent

active

039973611

ABSTRACT:
A two-constituent combination of phosphoric and nitric acids with a minimal volume of water. The composition is designed to remove stains, corrosion, dirt and encrustations from coinage metals composed mainly of copper, silver, brass, bronze and gold. No abrading action is required and there are no adverse effects on the substrate.

REFERENCES:
patent: 2428464 (1947-10-01), Lum et al.
patent: 2705191 (1955-03-01), Jumer
patent: 2915387 (1959-12-01), Kolodney
patent: 3275560 (1966-09-01), Wasserman
Cleaning and Finishing of Aluminum and Aluminum Alloys, Metals Hand Book vol. 11, date 1961, pp. 617 and 618.

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