 Lead and tin : high density ; extremely close dimensional accuracy ; used for special forms of corrosion resistance . Such alloys are not used in foodservice applications for public health reasons . Type metal , an alloy of lead , tin and antimony ( with sometimes traces of copper ) is used for casting hand @-@ set type in letterpress printing and hot foil blocking . Traditionally cast in hand jerk moulds now predominantly die cast after the industrialisation of the type foundries . Around 1900 the slug casting machines came onto the market and added further automation , with sometimes dozens of casting machines at one newspaper office . 
