Cone 9 Black

Albany slip 100

Cobalt carbonate 4
EPK 6

Na2O 0.05 Al2O3 0.66 SiO2 4.00
K2O 0.14 P2O5 0.00
MgO 0.27 TiO2 0.02
CaO 0.41 Fe2O3 0.13
CoO 0.13

Alumina:Silica ratio is 1.00:6.09
Neutral:Acid ratio is 1.00:6.32
Alk:Neut:Acid ratio is 1.00:0.66:4.15

Expansion: 67.5 x 10e-7 per degree C