SIO-2 - High Fire Grogged Black - PRNF (0-0.5mm) - 1200-1260°C - 12.5Kg

High fire grogged black body bearing 40% grog 0-0.5 mm. Formulated for artistic ceramics, it is ideal for sculpture. The high content of grog confers a beautiful textured surface and an excellent behaviour during drying and firing. Its beautiful and intense black firing colour in oxidising atmosphere is very exclusive of PRN range and becomes an ideal artistic mean of expression. In reducing atmosphere, metallic effects with shades of blue are obtained. Available in extruded body (moist form).

• Firing range: 1200-1260ºC.
• Biscuit temperature: 1000ºC.
• Water content: 21%.
• Plasticity (IP Atterberg): 22.
• Carbonate content (CaCO3): 0%.
• Drying shrinkage: 7.0%.
• Firing shrinkage (1260ºC): 4.5%.
• Porosity (water absorption at 1260ºC): 9.4%.
• Dry bending strength: 2.0 N/mm2.
• Fired bending strength (1260ºC): 27.5 N/mm2.
• Thermal coefficient (25-500ºC): 55.8x10^-7ºC^-1.