540i

A unique multi-purpose clay. Not recommended for microwave ware as iron oxide stain gets hot. 

Characteristics:
Cone: 6
Wet Color: Black
Fire Color
                Oxidation Cone 6: Black
Texture: 
Average Shrinkage 
                Oxidation Cone 6: 11,5%
Average Water Absorption: 
                Oxidation Cone 6: - than 0,5%    
COE x 10-6 Cone 6: 8,55

* Protect from freezing.