Making Copper Patina Art

A patina is a surface coating on metal brought on by exposure to the air and other elements over years. Because of the artistic nature of some patinas, some people want to speed up the oxidation process through chemical baths. Copper patinas can vary in color from purple or black to light yellow. However, the most well-known patinas for copper are green. This hot process oxide bath will give your copper art an antique-looking green patina. All fabrication, design and texturing should be completed before the patina is added.

Things You'll Need

• 1/3 ounce ammonium chloride
• 3 ounces cupric sulfate
• 1 quart distilled water
• Oven
• Stove
• Large heat-resistant pot
• Tongs
• Heat-resistant gloves
• Cool water

Show More

Instructions

1. • 1

     Mix 1/3 ounce ammonium chloride and 3 ounces cupric sulfate in a heat-resistant pot. Add 1 quart distilled water, and heat to 180 to 190 degrees.

   • 2

     Heat the copper to 200 degrees using a preheated oven for 10 to 15 minutes.

   • 3

     Dip the heated metal into the heated solution using the tongs. Remove, and allow to dry at room temperature. Once the metal has cooled for at least 15 minutes, rinse with cool water.

   • 4

     Reheat the metal, and repeat the process until the desired color develops.