SIO-2 - Grogged Black Earthenware - PM/CHF (0-0.5mm) - 970-1025ºC - 12.5Kg

Grogged black earthenware body bearing 20% grog 0-0.5 mm. Ideal for medium size pieces. Its black colour in an oxidising atmosphere is a highlight in the range of low temperature colours. The presence of grog clay confers the ceramic body a very interesting textured surface (not flat) which, in turn, provides a set of suitable properties for the design of pieces in complex drying situations, thus avoiding the creation of deformations and cracks. Available in extruded body (moist form), being suitable for shaping and modelling.

• Firing range: 970-1025ºC.
• Water content (throwing): 19%.
• Plasticity (IP Atterberg): 14.
• Carbonate content (CaCO3): 6%.
• Drying shrinkage: 4.5%.
• Firing shrinkage (1000ºC): 0.9%.
• Porosity (water absorption at 1000ºC): 14.6%.
• Dry bending strength: 3.1 N/mm2.
• Fired bending strength (1000ºC): 21.3 N/mm2.
• Thermal coefficient (25-500ºC): 75.0x10^-7ºC^-1.