BORAX 1/2 Pound MELTING FLUX & GLAZE DISH CRUCIBLES 8 oz. - GOLD SILVER JEWELRY (E 11) NOVELTOOLS BORAX FLUX FOR GLAZING CRUCIBLES FLUX for MELTING GOLD - SILVER Borax Technical Grade in a 1/2 Pound Bag, this is Borax Pentahydrate in the Granular form. Borax has a wide variety of uses, a component of many products. It can be used to glaze ceramic crucibles, as a flux in casting and soldering. Borax when used in melting of Gold and Silver helps to dissolve Oxides and other impurities and produce a fluid borate slag that collects on the surface of the molten metal. This slag is periodically removed, by use of a carbon-graphite or clay rod. Sale is for 1 Bag 8oz. *Item has never been used, packed and sealed in a clear plastic bag.