PotClays Frit 2279 Silica/Alumina ratio: 8.2:1 Equivalent Molecular Weight: 534.695 Molecular Formula of PotClays Frit 2279: CaO 0.350 Al2O3 0.430 SiO2 5.720 MgO 0.272 B2O3 1.380 ZnO 0.187 Li2O 0.190 Percentage Analysis 64.25 % SiO2 8.20 % Al2O3 2.05 % MgO 3.67 % CaO 1.06 % Li2O 2.85 % ZnO 17.92 % B2O3 _____________________ 100 % TOTAL Comments: Low expansion frit. From PotClays in England.