Sio-2 PRAF Sculpture Clay Sold in 27.5lb bags White Sculpture/Raku Clay with Fine Grog White sculpture/raku clay with 40% fine grog 0-0.5 mm (up to 35 Mesh). Formulated for artistic ceramics, it is ideal for sculpture, murals and Raku pieces. The high content of grog confers a beautiful textured surface and an excellent behaviour during drying and firing. Its particular ivory colour after firing is much appreciated and provides an excellent ware for glazes and colouring oxides, which develop bright and intense tones. It is also known as “Rafael” clay, and it is very popular because of its excellent behaviour for Raku. Available in extruded body (moist form). Firing - Ceramic kiln high fire Weight/Volume - 27.5 lbs - 12,5 kg Grog - Fine grog State - Moist form (plastic body) Stiffness - For wheel throwing and handbuilding Firing range: Cone 6-10 (2264º-2372ºF / 1240-1300ºC) Bisque firing temperature: Cone 06 (1832ºF / 1000ºC) Water content: 17% Plasticity (IP Atterberg): 16 Carbonate content (CaCO3): 0% Drying shrinkage: 5.4% Firing shrinkage at Cone 10 (2372ºF / 1300ºC): 4.6% Porosity (water absorption at Cone 10 (2372ºF / 1300ºC)): 4.1% Dry bending strength: 2.4 N/mm2 Fired bending strength (2372ºF / 1300ºC): 26.2 N/mm2 Thermal coefficient (77-932ºF / 25-500ºC): 55.9x10^-7ºC^-1
