SIO-2® Berlin Grey Stoneware Clay with Impalpable Grog, 27.6 lb
Price of clay also includes bisque firing, glazes, and glaze firing of your work. No clay may be brought into the School from an outside source.
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Berlin Grey is a stoneware clay body with 40% impalpable grog (up to 80 Mesh). 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. Depending on the firing temperature, it develops an interesting range of greys, from cement to dark grey, which satisfies the most avant-garde trends in artistic ceramics.
Firing range: Cone 5-10 (2192º-2372ºF)
Biscuit: Cone 06 (1832ºF)
40% Impalpable Grog (up to 80 Mesh)
Water content: 19%
Plasticity (IP Atterberg): 16
Carbonate content (CaCO3): 0%
Drying shrinkage: 5.7%
Firing shrinkage at Cone 6: 6.7%
Porosity (water absorption) at Cone 6: 0.1%
Dry bending strength: 2.9 N/mm2
Fired bending strength at Cone 6: 42.9 N/mm2
Thermal coefficient (a25-500ºC): 53.8x10-7ºC-1