Decreases the hair cracking. Optimize the thermal shock resistance in stoneware bodies. Forms opaque matt glazes.
3MgO * 4SiO2 * H2O - Molar weight: 378
Chem. analysis in %:
SiO2 48.0; MgO 29.0; Al2O3 10.0; Fe2O3 2.5; CaO 0.8; Loss of ignition (1050°C) 9.00.
Grinding fineness in %:
> 63 µm - mesh plus max. 3.5
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