Patination

What finish or color can I have on my sculpture? What is a patina?

The artist normally dictates the finish or patina of their work.

Bronze is a copper alloy and the metal will oxidise or react with the application of chemicals and heat producing a thin film known as the patina. The final result can change over time and is difficult to replicate on each piece in an edition. Many factors effect the final result including humidity, elements in the water supply, impurity in the metal, specific batch of chemicals, the experience of the applicator, etc. It is not like applying a coat of paint!

The unique coloring is achieved in many different shades and patterns depending on the chemical and heat being applied. Some of the more common include browns (ferric nitrate), greens (copper nitrates and sulphate), blues (ammonium salts) and blacks (liver of sulphur). Copper oxides also have intense colors, like black and red brick, and can be used as a binder.

To preserve and enhance the finish we apply and polish a wax over the sculpture to retain the finish for as long as the wax layer is maintained. Traditionally, beeswax was commonly used for effective protection. Unfinished bronze left outside will eventually go green as the copper reacts in the atmosphere.

There is some flexibility in the patina and alterations in the artist’s preference can occur on special orders. Please get in touch for more details