The basic process of forming
a shaped article by pouring and solidifying molten metal in a mould, which has
many variations in gold.
Jewellery is generally moulded
by the ‘lost wax’ or investment
casting process. In the manufacture of gold bars,
it distinguishes between those cast in a mould (such as good
delivery bars or kilobars) and small bars
(coined bars) and ingots
which are stamped out of a metal strip.
Continuous casting allows a
constant shape to be withdrawn from the bottom of a mould as the metal solidifies
so that semi-finished products such as strip and tubes can be produced.