Question

which zone of a flame is used by a Goldsmith to melt gold or silver and why

Answer 1

the outermost zone of a candle flame is used by a Goldsmith to melt gold or silver because it is the most hottest part of a flame which tend to melt the metals in contact with it

Answer 2

the outermost zone of a candle flame is used by a Goldsmith to melt gold or silver because it is the most hottest part of a flame which tend to melt the metals quickly and efficiently which allows goldsmith to melt gold in lesser time