SIO-2 - Black Earthenware - PM - 970-1025°C - 12.5Kg

Black manganese earthenware body. 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) in a wide range of water content depending on the shaping application: wheel-throwing, modelling and shaping processes.

• Firing range: 970-1025ºC.
• Water content (throwing): 21%.
• Plasticity (IP Atterberg): 16.
• Carbonate content (CaCO3): 8%.
• Drying shrinkage: 5.0%.
• Firing shrinkage (1000ºC): 0.9%.
• Porosity (water absorption at 1000ºC): 14.3%.
• Dry bending strength: 4.5 N/mm2.
• Fired bending strength (1000ºC): 28.9 N/mm2.
• Thermal coefficient (25-500ºC): 77.9x10^-7ºC^-1.