In this way, it is an essential ingredient for both the ceramic product and its glaze.[http://www.chemicalland21.com/arokorhi/industrialchem/inorganic/BORIC%20ACID.htm] Another important commercial use of boric acid is its ability to make cloth and other products flame-retardant.[http://encarta.msn.com/encyclopedia_761566332/Boric_Acid.html]+