PotteryCrafts Frit P2950 Silica/Alumina ratio: 6.1:1 Equivalent Molecular Weight: 343.688 Molecular Formula of PotteryCrafts Frit P2950: PbO 1.000 Al2O3 0.086 SiO2 1.860 Percentage Analysis 32.50 % SiO2 2.55 % Al2O3 64.95 % PbO _____________________ 100 % TOTAL Comments: Lead bisilicate frit. From PotteryCrafts in England.