The system is designed to use lead free metals including Pewter, which melts at approx 245°C, and also a lower melting point alloy which has a melting point of 137°C. These allow the use of moulds which have been manufactured in vulcanised rubber, MDF, soap, woods, Cuttle Fish and many other materials. Moulds can easily be made by hand or using CNC milling techniques. Alternatively, pre-made moulds can be purchased separately along with the Pewter and Lower Melting Point Alloy.