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Cleaning Precious Metals with citric acid
Q. What is a proper mixture for citric acid and water (concentration lb/gallon) for cleaning cast precious metals?
Nghi Nguyen- Owatonna, Minnesota
A. I don't think any concentration of citric acid will clean precious metal castings.
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Tom Pullizzi
Falls Township, Pennsylvania
A. Nghi:
It depends on what you are cleaning off of the casting. I am not certain of the value of plain citric acid , but formulations on the market containing citric acid can work very well. citric acid formulations are very safe in cleaning precious metals without attacking the metals.
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Lee Kremer
Stellar Solutions, Inc.
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McHenry, Illinois
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