Standard Prince August casting metal.
This is a Standard Metal (65% Lead / 2% Antimony / 33% Tin) and is the cheapest metal available.
Safety advice
Products containing lead may be harmful if swallowed or chewed, or if lead is otherwise transferred from hands to mouth. Not suitable of children under 14 years for casting or for handling the resulting cast. Hot metal can cause serious burns. Cover the working surface with paper or hard board. Never cool the metal or moulds with water
Guide to metal casting (3.3Mb PDF).
Guide to Resin & Metal Casting Service (1.8Mb PDF).