PotClays Frit 2270 Silica/Alumina ratio: 8.2:1 Equivalent Molecular Weight: 423.508 Molecular Formula of PotClays Frit 2270: Na2O 0.414 Al2O3 0.236 SiO2 3.850 CaO 0.413 B2O3 0.827 ZrO2 0.426 MgO 0.112 ZnO 0.061 Percentage Analysis 54.60 % SiO2 5.68 % Al2O3 6.06 % Na2O 1.07 % MgO 5.47 % CaO 1.17 % ZnO 13.56 % B2O3 12.39 % ZrO2 _____________________ 100 % TOTAL Comments: White zircon borax frit. From PotClays in England.