Understanding lost-wax casting

[The Dioskouri]

Not to nit-pick, but so it's clear, bronze melt temperature is a lot higher than 1200 degrees. It's melt temperature is approximately 1836 degrees with a casting or 'liquidus' temperature about 100+ degrees higher.

Because the metal would cool too rapidly into a cold investment mold, the plaster/clay mold must also be brought up to heat. Usually around 1200 degrees for a bronze pour. This may be where the confusion lies.

Cheers