Starting with its feet, the framework was firstly set up by piecing together the rolled steel according to the model, as clay is soft and wet, the sculptors needed to make some wooden sheets to support the clay to avoid falling. The whole framework, which was little smaller and thinner than the completed sculpture, looked like a huge skeleton.
Step Four: Rubber Mold
The rubber mixture is applied directly to the surface of the clay, using a brush to paint it onto the surface of original clay and fixed with plaster, wooden bar and hemp.
After the sculpture was installed, the last step is doing patina on bronze. Before doing it, it is necessary to ensure the sculpture was clean and free of oil and grease by scrubbing it with a weak "pickle" solution of nitric acid. The craftsmen sand blast the bronze, and a couple coats of ferric nitrate, ammonium sulfide was applied to darken the sculpture and add some cooler silver and gray color.
Different from stone, bronze is an alloy which combines copper with tin, so that bronze ages and is exposed to the patina. If you want to keep your bronze sculpture clean, you may wonder how to
go about it. In fact, cleaning bronze sculptures is a simple task that requires little time.
