Alumina Oxide (Dry)
Alumina Hydrate is a source of alumina in glazes. It is more correctly referred to as Aluminium hydroxide, Al(OH)3, but in studios and labs you will frequently hear it called alumina hydrate. It is a fine granular white powder, and because it is hydrated, it remains in suspension in glazes. Small amounts decrease fluidity of glazes. In certain pink glazes, a small amount of alumina hydrate can enhance the color outcome.