BLACK STONEWARE BODYCLAY PRN GROG 0-0.5 MM – 12,5 KG.

Refractory grogged stoneware clay, black in both oxidation and reduction, in a rectangular block. Ideal for handbuilding. Very plastic and easy to work. Excellent for large-scale sculptures. Soft hardness. The clay should be well sealed when not in use. 12.5 kg package. Technical data sheet available for download.

– Dry mechanical strength: 40±10 Kgf/cm2;
– Fired mechanical strength: 500±50 Kgf/cm2;
– Total shrinkage: 10,0±1,5%;
– Water absorption: 2,0±1,0 %;
– Cubic thermal expansion coefficient (ΔT20–400 °C): (230 ± 5) x 10 -7 ºC-1
– Bisque temperature: 990ºC – 1000ºC;
– Glaze firing temperature: 1260 ºC (±20 ºC)