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Black Earthenware Clay
Black earthenware clay body. Its black color in oxidizing atmosphere is a highlight in the range of low firing colors. Its fineness and plasticity make it an excellent choice for throwing and modelling. Very good behavior with standard pottery glazes. Available in extruded body (moist form), being suitable for wheel-throwing, shaping and modeling.
Firing range: Cone 06-05 (1855º-1911ºF)
Water content: 21%
Plasticity (IP Atterberg): 16
Carbonate content (CaCO3): 8%
Drying shrinkage: 5.0%
Firing shrinkage at Cone 06: 0.9%
Porosity (water absorption) at Cone 06: 14.3%
Dry bending strength: 4.5 N/mm2
Fired bending strength at Cone 06: 28.9 N/mm2
Thermal coefficient (a25-500ºC): 77.9x10-7ºC-1
