Black earthenware body with 20% fine 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 confers to clay 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
Supply: packages 12.5 kg
For other stiffness, packing or supply, please ask.
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