A pliable clay with smooth grog and color from manganese and iron. Fires almost black when reduced and dark brown/black in oxidation.

WC391, B3 Brown

  • Characteristics Cone: 5 Wet Color: Red/Brown Fire Color Oxidation: Brown/Black Reduction: Black Texture: Slightly Coarse Penetrometer Target: 6.75 Avg. Shrinkage 2±%: 10% Avg. Water Absorption 1±%: 3% COE x 10-6: 7.275