The best known variety of gold flux is brown gold flux, the color of which comes from tiny copper crystals formed in the glass melt during the special manufacturing process. The production of gold flux is complicated and costly. For brown gold flux, the glass mass is first melted from ...
The best known variety of gold flux is brown gold flux, the color of which comes from tiny copper crystals formed in the glass melt during the special manufacturing process. The production of gold flux is complicated and costly. For brown gold flux, the glass mass is first melted from silica sand and other silicate raw materials as well as copper oxide and other metal oxides, then the metallic Copper is produced by chemical reduction in the melt. Under exclusion of air and through very slow cooling, fine copper crystals can form in the melt, which later trigger the glitter. Depending on the type of metal salts added, gold flux has different colors: Copper colors brown-red, chromium colors green, and cobalt colors dark purple.
