Casting Powder

SiO2 30 - 33%
CaO 28-30%
Al2O3 4 - 6%
Na2O/K2O 5-7%
MgO MgO
Li2O 1 – 1.5%
B2O3 1 -2%
C free 18-22%
Melting Point (+/- 20 0 C) -1004° C, Viscosity at 1300O C – 4-6 Poise