Boric acid is a crystalline water soluble boron mineral. It is white in appearance and can be used as granules or as a powder. Both forms are stable under normal conditions, free-flowing, and easily handled by means of air or mechanical conveying. In solution, they are mildly acidic.
Boric Acids are used as the B2O3 source in the formulation frit. Fast fire frits for tiles find this material especially useful (compared to the deca and pentahydrate forms) because of their requirement for low sodium levels.