Potclays Onyx Black Porcelain Available In Store CLY

164-ONYX - Onyx Black Porcelain

• Recommended firing range 1200-1240C / Cone 5-6
• Indicative texture 1 (Smooth 1-Coarse 10).
• Onyx Black Porcelain takes on a beautiful black/graphite colour when fired as recommended to the upper part of its firing range.
• It is highly plastic making it ideal for wheel-throwing and modelling alike. 
• Suitable for tableware.
• Supplied in a 5kg pack. 
• Compatible with Aneto Porcelain 164-ANET.
• Onyx Black Porcelain is suitable for tableware (food-safe), according to ISO 6486.
• The manufacturer recommends zinc-free clear glaze such as Mayco SW004 for Onyx Black Porcelain.

SIO2 Technical Data:

• Biscuit: Cone 06 (1020ºc)
• Water content: 20%
• Plasticity (IP Atterberg): 11
• Carbonate content (CaCO3): 0%
• Drying shrinkage: 5.4%
• Firing shrinkage at Cone 6: 10.3%
• Porosity (water absorption) at Cone 6: 0.0%
• Dry bending strength: 3.1 N/mm2
• Fired bending strength at Cone 6: 39.8 N/mm2
• Thermal coefficient (at 25-500ºC): 54.3x10-7ºC-1"