Oxygen-Free Copper (OFC) is a high-purity form of copper that contains minimal oxygen content—typically less than 0.001%. It is manufactured using a process of electrolytic refining and vacuum melting, which eliminates impurities and oxygen. The result is a copper with superior electrical and thermal conductivity, making it highly suitable for high-end audio/video systems, magnet wire... https://www.emergenresearch.com/industry-report/oxygen-free-copper-market