Producing pieces of jewellery

摘要

In the method for producing pieces of jewellery (in particular, rings), pref. by the lost wax process, comprises: (a) a first casting is produced by pouring a first metal/alloy into a first mould; (b) placing the casting into a second mould; and (c) pouring a second metal/alloy with a lower m.pt. than the first one into the second mould to embed the first casing.