| WEB EXTRA: Copper-Patina Formula |
From "Wood Works"
episode WWK-303 |
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Copper Patina Mixture Following is the list of ingredients and procedures for the copper-patina solution provided by David Marks. Safety Alert: The copper patina solution is toxic. Follow safety precautions, and always wear protective gloves when working with wood stains, solvents and other toxic chemicals.
Ingredients: Ammonium chloride, 1/2 ounce
Copper sulfate, 1/2 ounce
Household salt, 1/4 ounce
Hot water, 8 ounces
Zinc chloride, 1/16 ounce
Sawdust, 1/2-dozen handfuls, or enough to cover the copper surface of the project.
Acetic Acid or vinegar, 1/8 ounce
Mixture and application: - Always add the chemicals to the water. Never add the water to the chemicals.
- Stir chemicals and water until everything has dissolved.
- Use a spray bottlewith water and dampen sawdust. Then mix the chemical solution into the sawdust (figure A). Save about 15 to 20 percent of the solution (to drip on and apply later).
- Spray water onto copper, press sawdust onto surface, wrap with cheesecloth, spray with water so that the cheesecloth and sawdust cling to the copper (figure B).
- Drip remaining chemical solution onto cheesecloth and sawdust and copper.
- Wrap with 4 mil plastic sheets (figure C). Seal with duct tape and set aside for three weeks.
- After three weeks, unwrap (figure D).
- Use water and an old brush to gently remove the crusty sawdust (figure E).
- Let the sun dry the copper surface (figure F).
- Finally, dab micro-crystalline wax onto surface (figure G) and let dry.
RESOURCES :
Fine Woodworking
A magazine devoted to high-quality craftsmanship in woodworking.
The Taunton Press Inc.
Website: www.taunton.com
David Marks Website
David Marks, DIY's Wood Works host, is a master woodworker. For more information on cut sizes and project details, please contact him via his Website at www.djmarks.com
Popular Woodworking
F & W Publications, Inc.
Website: www.popularwoodworking.com
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