CD DVD replication is a physical production process that involves actually pressing the discs during manufacture from a glass master. Replicated discs are also referred to as CD ROM or DVD ROM discs, with the 'ROM' standing for 'Read-Only Memory' (as opposed to the CD-R or DVD-R where the 'R' stands for 'Recordable'). The glass master is made of glass that has been coated by a chemical, which is burned off with a laser. The glass master is a 'negative' of the CD DVD and it is then coated with a molten nickel compound and turned into a 'stamper'. The stamper punches tiny pits in the production CDs or DVDs that use molten aluminium as the reflective surface and polycarbonate for the remainder of the disc. CD DVD replication is a very quick and cost-effective production method for larger quantities of discs (1000 or more).
Replicated media is then printed using a five colour silk screen or offset lithographic process, resulting in a very high quality disc.