The advantage of bronze is they don't rust and you can pour cast iron into them so long as you have applied mould release (deltacast, microcollid or mould coat)

Unlike some ingot moulds these have been designed with a good taper and smooth inside walls to allow easy release of ingots.

The edge lip or legs can be used as a handle for tipping out using tongs. Prior to use the ingot mould can be coated with delta cast mould release or mould blacking

For making ingots after melting down scrap or when too much metal has been smelted.

Ingot moulds should be pre-heated to drive off moisture prior to pouring molten metal into them.