Molding of thermoplastic material produced from the stamper by the application of heat and pressure and subsequent cooling. Two stampers, one for each side of the disc, are steam heated in the press as the pressure is applied to the plastic material, which is then cooled before removal. Too short a heating/cooling cycle can cause minute discontinuities and pits. On removal, the flash is trimmed from the pressing which is then labeled and sleeved. The next step is Testing.