Caring for Copper, Brass and Bronze by Empire Copper
Caring for your Copper, Brass or Bronze piece(s) can be done using a variety of methods and household products. Here are some common, Empire Copper approved techniques.
In a clean, natural environment, it can take up to 30 years to achieve the iconic green "verdigris" patina that copper is known for. Similar results can be achieved through forced/controlled patination in as little as a few days, with deeper and more colourful patinas taking longer.