PotteryCrafts Frit P2960 Silica/Alumina ratio: 6.1:1 Equivalent Molecular Weight: 390.745 Molecular Formula of PotteryCrafts Frit P2960: K2O 0.029 Al2O3 0.556 SiO2 3.403 Na2O 0.202 B2O3 1.030 CaO 0.760 MgO 0.010 Percentage Analysis 52.30 % SiO2 14.50 % Al2O3 0.70 % K2O 3.20 % Na2O 0.10 % MgO 10.90 % CaO 18.30 % B2O3 _____________________ 100 % TOTAL Comments: From PotteryCrafts in England.