Plain copper, often referred to as electrolytic tough pitch (ETP) copper when produced to high purity, is a fundamental industrial metal known for its excellent electrical and thermal conductivity. In its uncoated, non‑alloyed form, it serves as a base material for a wide range of electrical, mechanical, and architectural applications. The typical copper content exceeds 99.9%, with very low levels of impurities to preserve its conductive and forming characteristics.One of the most important properties of plain copper is its outstanding electrical conductivity, which is among the highest of all engineering metals. This makes it the material of choice for power transmission and distribution, internal wiring, busbars, transformer windings, and communication cables. Its low electrical resistance minimizes energy loss and heat generation, improving overall system efficiency. At the same time, its high thermal conductivity enables rapid heat dissipation, which is critical in components such as heat exchangers, radiators, and electronic cooling elements.Mechanically, plain copper offers a favorable combination of strength, ductility, and toughness. It can be easily drawn into fine wires, rolled into thin sheets or strips, and formed into intricate shapes by bending, stamping, or deep drawing. Cold working can significantly increase its strength while still retaining adequate formability. When required, it can be annealed to restore softness and ductility. This versatility in fabrication supports the production of connectors, terminals, springs, gaskets, and precision components.Corrosion resistance is another notable advantage. In many environments, plain copper develops a thin, adherent oxide layer that protects the underlying metal from further attack. In outdoor exposure, this may gradually evolve into a characteristic brown or green patina. This natural protection, combined with its warm metallic color, has led to widespread use in roofing, façade panels, decorative trim, and interior design elements. In plumbing and heating installations, copper tubing is valued for its durability, hygiene, and resistance to many forms of water‑borne corrosion.Plain copper is also non‑magnetic and exhibits good resistance to biofouling and bacterial growth, which can be beneficial in certain marine and sanitary applications. It is fully recyclable without loss of performance, and a large percentage of copper in circulation comes from recycled sources. This closed‑loop potential supports resource efficiency and reduces environmental impact compared to many other materials.In summary, plain copper is a high‑purity, unalloyed metal combining exceptional conductivity with good mechanical workability, corrosion resistance, and recyclability. These attributes underpin its central role in electrical infrastructure, electronics, building construction, plumbing, and precision engineering across modern industry.