How to Oxidize Copper
Want to make a new copper object look old quickly, but don't have a lot of money to spend on an expensive kit from a crafts store? You can oxidize it yourself fairly easily at home with some simple chemicals. Here is how you do it.
- Difficulty:
- Moderately Easy
Instructions
Things You'll Need
- Abrasive scrubbing powder
- Cleaning pad
- Gentle soap solution
- Water
- Well ventilated location
- Misting bottle
- Salt
- Ammonia or muriatic acid
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-
1
Clean the copper object thoroughly with an abrasive scrub and a cleaning pad. Scrub the item in a linear fashion to ensure that the oxidized finish will have an even grain and be smooth, not patchy.
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2
Rinse off the piece with a gentle soap and water solution, like one made from Ivory dish detergent. Wash off any soap residue and pat dry.
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3
Make sure your copper piece is in a well ventilated location, away from any items you don't want sprayed with a solution. It is perfectly alright for it to be outside. In fact, some people swear that makes the whole reaction go faster than if it is not exposed to humidity and the elements.
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4
Mist the piece at least twice a day with a solution of water, salt and some kind of acid. A good general ratio is 1 qt. of water to 2 Tbsp. salt with a good splash of regular household ammonia or muriatic acid.
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5
Wait a few weeks for the patina to develop. You should gradually see a beautiful green coating replacing the shiny copper.
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1
Tips & Warnings
Find muriatic acid at any place that sells swimming pool supplies.
Muriatic acid, even in a weak solution, can etch concrete. Use it with caution.
