Sio-2 PM Black Earthenware Sold in 27.5lb bags Black manganese earthenware clay. Its black colour in oxidising atmosphere is a highlight in the range of low firing colours. Its fineness and plasticity make it an excellent choice for throwing and modelling. Very good behaviour with standard pottery glazes. Available in extruded body (moist form), perfect for wheel-throwing, modelling and shaping procesess. Firing - Ceramic kiln low fire Weight/Volume - 27.5lbs / 12.5 kg Grog - Ungrogged State - Moist form (plastic body) Stiffness - For wheel throwing and modelling/handbulding Firing range: Cone 06-05 (1788º-1877ºF / 970-1025ºC) 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
