Amount Ingredient 15 Barium Carbonate 10 Gerstley Borate--1999 15 Wollastonite 39 Nepheline Syenite 10 Kaolin--EPK 11 Silica 100 Total Unity Oxide .209 Na2O .061 K2O .021 MgO .472 CaO .237 BaO 1.000 Total .423 Al2O3 .115 B2O3 .003 Fe2O3 2.553 SiO2 .001 TiO2 0 P2O5 6 Ratio 8.3 Exp