Sio-2 PA White Earthenware Clay Sold in a 27.5lb bag White earthenware clay body especially formulated for wheel-throwing and modeling. It is a high quality and polyvalent clay, very popular for its fineness and plasticity. Its balanced calcium carbonate content confers higher stability than traditional white earthenware clays. Its coefficients of thermal expansion are ideal for standard pottery glazes, in both single and twice firing processes. 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 05-03 (1922-1976ºF / 1050-1080ºC) Water content (throwing): 20% Plasticity (IP Atterberg): 16 Carbonate content (CaCO3): 17% Drying shrinkage: 6.8% Firing shrinkage Cone 05 (1922ºF / 1050ºC): -0.4% Porosity (water absorption at Cone 05 (1922ºF / 1050ºC)): 12.3% Dry bending strength: 5.1 N/mm2 Fired bending strength Cone 05 (1922ºF / 1050ºC): 27.8 N/mm2 Thermal coefficient (25-500ºC): 79.1x10^-7ºC^-1
