The major borate minerals are Colemanite and Ulexite. The geology required for borates is found in very few places in the world (mainly southern California, Chile, Turkey, Argentina, Spain, Russia). Borate minerals supply boron, a key flux in glazes, enamels, glasses, etc.
|Materials||Disodium Octaborate Tetrahydrate|
Most ceramic glazes contain B2O3 as the main melter. This oxide is supplied by great variety of frits, thousands of which are available around the world.
Borate glazes, those fluxed with the oxide B2O3, are the most common type used in ceramic industry and hobby for low and medium temperatures.
|Hazards||Boron Compounds and Their Toxicity|
Borax on Wikipedia