What material is the disc made of, metal or plastic?
The compact disk is the carrier of functional structures (such as grooves, etc.), and its material is polycarbonate (PC), which has excellent impact toughness, large temperature range, good dimensional stability, weatherability and non toxicity.
In general, the substrate is colorless and transparent polycarbonate board, in the entire disc, it is not only the carrier of the groove, but also the physical shell of the whole cd.
The CD disk has a substrate thickness of 1.2mm, a diameter of 120mm, a hole in the middle, and a circular shape. It is the shape of the disc. The reason why the disk can be taken at will depends mainly on the hardness of the substrate.
