Riviera Blue Opalescent Powder Frit - 96COE - 4oz - Made from System 96 Glass This fusible glass frit is 96COE; 4oz pkg. This frit is made from crushed System 96 Compatible sheet glass. System 96 frit is rigorously magnetically cleaned to insure contaminant free pure color results. Please note that some frit may strike, or change color, once its full fused.