Question

which zone of aflame does a goldsmith use for melting gold and sliver and why?

Answer 1

gold Smith uses the outer most layer zone of a flame for melting gold and even silver also.because it is the hottest zone and non luminous in nature.

Answer 2

a goldsmith uses blue zone of flame which is also called as non - luminous zone for melting gold and silver as in blue zone complete combustion takes place