Darkening copper is a means of altering the floor of copper to offer it a darker, extra aged look. This may be performed for aesthetic causes, to create a selected look or to guard the copper from corrosion. There are a variety of various strategies for darkening copper, every with its personal benefits and downsides.
One frequent methodology is to make use of a chemical resolution to oxidize the floor of the copper. This may be performed with a wide range of chemical substances, together with liver of sulfur, potassium sulfide, and ammonium sulfide. The chemical response between the copper and the sulfur creates a darkish patina on the floor of the steel.