SIO-2 - High Fire Grogged Black - PRNI (0-0.2mm) - 1200-1260°C - 12.5Kg

High fire black body with 40% impalpable grog 0-0.2mm. Formulated for artistic ceramics, it is ideal for wheel-throwing and modelling smooth pieces with fine details. The high content of grog confers 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. Suitable for tableware (food-safe), according to ISO 6486:1999. Available in extruded body (moist form).

• Firing range: 1200-1240ºC.
• Biscuit temperature: 1000ºC.
• Water content: 21%.
• Plasticity (IP Atterberg): 22.
• Carbonate content (CaCO3): 0%.
• Drying shrinkage: 7.0%.
• Firing shrinkage (1240ºC): 7.1%.
• Porosity (water absorption at 1240ºC): 1.3%.
• Dry bending strength: 4.6 N/mm2.
• Fired bending strength (1240ºC): 33.3 N/mm2.
• Thermal coefficient (25-500ºC): 51.1x10^-7ºC^-1.