QUOTE(shawn @ Oct 29 2006, 06:49 PM) [snapback]4858252[/snapback]
Anyway, how did ancient china produce/make gold and silver ingots at that time, using moulds?
I watched a show, silver is made using moulds. The factory i watched is not making silver from silver ores, rather from silver ingots, silver pieces collected from banks. Reason for making new ingots, because of wear and tear from these silver exchanging hands and different standards of silver purity in different provinces.
Silver are melted and more silver or filler (other metals) are added as per required to reach the desired standards. Silver when cooled is broken up and remelt again. Finally poured into wooden moulds. Once cooled, the wooden moulds are broken apart and there, silver ingots are formed. The one i see are 50 taels, size of a small orange.
Someone need to verify this process, my memory is abit fading.