Acid washing the copper will make the green patina happen.
How to get a blue green patina on copper roof.
Oxide film on the copper will cause poor adherence of the patina.
This will make your roof a nice patina green in hours.
Link to product info on amazon with a bristle brush and a spray bottle protect your hands.
This process will take several months or years depending on the atmospheric conditions in your area.
Copper reacts with oxygen that is in the air resulting in copper dioxide equation 1.
When roof is dry and clean apply straight muriatic acid affil.
Exposure to air can cause your copper to oxidize and tarnish with a blue green patina.
Bleach sprayed on brass will give you a green patina i haven t tried it on copper.
1 made a solution with the following ratio.
The wet copper is placed on a towel to air dry.
Remove oxidation from copper with a paste made of white vinegar salt and flour.
Many common cleaners leave this patina untouched.
That being said it is still possible to use chemical treatments to advance this copper roof patina process.
After rinsing soak the copper in a 1 to 1 ratio of white vinegar and salt in a small bowl for half an hour.
This is done by swabbing the surface with a cold 5 10 solution of sulfuric acid.
The patina is due to the process of oxidation and the sulfur particles in the atmosphere.
The patina will appear only when the solution dries.
The formation of patina on copper is similar to the formation of rust on iron.
If you want your roof to look 100 years old overnight just clean it with wright s copper cream affil.
Achieving a quality patina in our desert climate.
It s even possible to choose the color of a coppers patina through chemical treatment.
The copper dioxide then reacts with more oxygen to form copper oxide equation 2.
There is however a major caveat to that unnatural choice.
Link to rockler and rub gently.
Let the solution air dry and then repeat until the patina appears.
3 tablespoons white vinegar 5 45 ml 1 teaspoon table salt 5 ml 2 stirred very well until the salt dissolved completely.
It may take many years for the green patina to occur.
Washing the copper with different solutions can accelerate the natural patina process.
Link to product info on amazon then take 0000 steel wool affil.
Copper roofs which have weathered for six months or more should have the oxide film removed before the coloring operations start.
Copper roofing is bright pink to begin with and in time it can gain a brownish color and then a nice blue green patina.
For instance a simple salt water bath will start the natural tarnishing to start.
Copper roofing and gutters are slow to patina here in the desert with our dry hot climate.
Both happen when oxygen in the air interacts with the metal atoms in the presence of water.
Prep to remove oxidation by verifying the metal item is really copper and checking for the presence of lacquer.
