How to Give Copper Repousse an Antique Look
Repousse is a metalworking technique wherein the ornamental pattern is pounded into the metal from the back. This creates raised artwork on the front of the metal. Newly created copper repousse can be made to look antique using an at-home patina treatment. When copper ages naturally, the moisture in the air reacts with the metal to eventually create a green or brown coloration on the surface. The ingredients of the green and brown patina formulas mimic that reaction, though the results aren't as permanent.
Things You'll Need
- Green Patina:
- Washcloth
- Small bowl
- White vinegar
- Ammonia, non-detergent
- Salt
- Paintbrush
- Brown Patina:
- Washcloth
- Small bowl
- Hot water
- Baking powder
- Paintbrush
Instructions
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Green Patina
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1
Dampen a clean washcloth with water. Use the cloth to remove any surface particles of dust or debris on the copper.
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2
Mix together in a small bowl two parts vinegar, one and one-half parts ammonia and one part salt. Stir to combine well.
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3
Dip a paintbrush in the bowl and shake off the excess. Use the brush to apply a thin, even coat of the liquid across the repousse. Pay special attention to make sure you coat the nooks created by the raised design.
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4
Allow the first coat to dry for an hour. Apply a second coat with the brush. Allow to dry overnight in a place with moist air. Note that the humidity in the air is what causes the patina reaction to happen.
Brown Patina
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5
Wipe down the repousse with a damp, clean washcloth.
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6
Fill a small bowl three-quarters full with hot water. Add baking soda by the teaspoon, stirring after each addition, until the powder no longer dissolves into the water.
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7
Dip a paintbrush into the liquid and apply to the repousse, making sure the coat is even and covers all parts that you want to turn brown. Allow to dry overnight. Note that the brown patina requires fewer coats than the green.
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1
Tips & Warnings
The patina will fade initially, but if you repeat the application process on a weekly to monthly basis, eventually the patina will become permanent.
