Lead, tin and copper with high purity of copper are cast together according to the needs. Copper rust is a chemical reaction that occurs on the surface of a copper sculpture as the surrounding environment changes. This reaction will undergo a dormant phase and a growth phase. Patina to the color green, and blue-based. Most of the bronze sculptures with short survival time and good preservation have beautiful shells such as "mercury enamel" or "black lacquer ancient". The old age is rusted, and its rust has obvious gradation. Generally, it is divided into rust joint layer, main body rust layer and ground rust layer from the outside to the inside. Common corrosion on the rust joint layer and attachments in the underground environment, such as soil or carbonized grass sawdust; under the rust joint layer, there is a layer of green or blue crystal rust which is the main rust layer; The following is a layer of black or reddish-colored oxide film close to the bronze, that is, the ground rust layer. The three layers of corrosion are clearly ordered and arranged reasonably.
Some bronze sculptures do not have a rust-bonding layer, or even a main body rust layer, but they must not have no rust layer of the earth. This is crucial for distinguishing old rust and new rust. Most antique bronze sculptures usually have only one layer of floating rust due to their short time. The color is single, the structure is loose, and the adhesion is poor. If the rust is removed, the fresh copper body will be directly exposed. Yandu bronze sculpture adopts advanced treatment technology to solve the problem of long-lasting oxidation resistance of the surface of the copper sculpture.
The original text is from the Chinese copper sculpture industry network http://
Environmentally Degradable Comb
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