This
deoxidizing flux keeps metal clean during melting (Gold, silver, etc.) and
pouring. Can also be used for preparing melts for assaying. Specially prepared
for making a paste; dissolves easily. Borax is also used mixed with water as a
flux when soldering jewelry metals such as gold or silver. Also used to glaze
crucibles and casting process. You will need to glaze your crucible with borax
before you melt any metal in it. This ensures that your metal doesn't stick to
the ceramic crucible
