Cone 9 Royal Blue

Dolomite 10
Whiting 14
Kona F-4 44
Ball clay 17
Silica 15
Total 100

Bentonite 1.75
Cobalt carbonate 2

Na2O 0.14 Al2O3 0.37 SiO2 2.56
K2O 0.07 TiO2 0.01
MgO 0.16 Fe2O3 0.00
CaO 0.59
CoO 0.05

Alumina:Silica ratio is 1.00:6.88
Neutral:Acid ratio is 1.00:6.92
Alk:Neut:Acid ratio is 1.00:0.37:2.58

Expansion: 75.7 x 10e-7 per degree C