AF red powder 5kg

Traditional red earthenware clay. It is a high quality and polyvalent clay, very popular for its fineness and plasticity. Its coefficients of thermal expansion are ideal for standard pottery glazes, in both single and twice firing processes. Incredible results in reducing atmosphere can be obtained (metallic reflection technique).

Firing range: 970-1055ºC / Cone 06-04
Water content (powder): 2-4%
Plasticity (IP Atterberg): 17
Carbonate content (CaCO3): 10%
Drying shrinkage: 5.5%
Firing shrinkage (1000ºC): 0.6%
Porosity (water absorption at 1000ºC): 13.5%
Dry bending strength: 6.6 N/mm2
Fired bending strength (1000ºC): 27.9 N/mm2
Thermal coefficient (25-500ºC): 77.7x10^-7ºC^-1