here's the formula for bbv clay

updated tue 19 dec 00

June Perry on mon 18 dec 00

71.3 SiO2
1.5 TiO2
18.8 Al2O3
0.08 Fe2O3
0.3 MgO
0.2 CaO
0.3 Na2O
1.9 K2O
Loss 4.9

Regards,
June