Sio-2 PRAI Clay White 12.5kg

Slower drying clay than the usual ones, formulated for modeling and elaboration of food-safe tableware (according to ISO 6486), pots, etc...

PRAI white refractory clay with 40% fireclay is a ceramic material widely used in the production of pieces that require high resistance to high temperatures.

Firing temperature*: 1240-1300ºC

Cake temperature: 1000ºC

Humidity: 19%

Plasticity (IP Atterberg): 16

Calcimetry (CaCO3): 0%

Drying shrinkage: 5.9%

Firing shrinkage 1300ºC: 7.0%

Porosity (water absorption) 1300ºC: 0.0% Porosity (water absorption) 1300ºC: 0.0%

Dry mechanical strength: 3.0 N/mm2

Fired mechanical strength 1300ºC: 51.0 N/mm2

Expansion coefficient 1250ºC (25-500ºC): 60.4x10^-7ºC^-1