What is Oxygen-Free Copper or OFC copper?
Oxygen-free copper (OFC) is copper that has been manufactured in an oxygen-free atmosphere. The reason for this is to reduce oxidation of the copper (as when copper turns green over very long periods of time). However, even very old cables have little or no noticable oxidation inside of them because they are sealed inside the cable. As far as video quality goes, oxygen-free copper conductors or shields perform no differently than standard or tinned copper conductors. A better way to prevent oxidation is to use tinned copper (copper coated with tin).
