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Copper, as one of the first to be utilized metals, has been playing an important role in human life. Generally speaking, the purification of copper needs great amount of electricity and the pure copper is soft, so copper alloys are more commonly used. To adjust the strength, hardness and corrosion resistance, some other metal elements are added. For example, brass, the most-used alloy, applies to zinc as main added elements. When the main added ingredient is tin, the alloy is named bronze.
a filter made of perforated brass sheets with round holes
Perforated copper or brass sheets are capable of filtration.
Perforated Copper Sheet
