While melting gold or silver in a crucible, I usually take a small
pinch of boric acid and add it to the metal right before casting.
This is to reduce the amount of oxidation that occurs while melting
the metal. I am noticing that the crucible now has a reddish color
to the bottom, and it seems to be building up. Does the buildup of
this red material affect the quality of the mixture of gold or
silver? Am I possibly using too much boric acid to flux the metal?
Also, is it best to always use separate crucibles for casting
different kinds of metals? Thanks.
Allentown, PA 18104