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White-grey porous material No. 19 is a special type of material which is characterised by its unique sinterability when fired at 1100 °C.
Basic price for purchase of 10–990 kg per quality.
10% discount for purchases from 1 tonne per quality.
White-grey porous material no. 19 is a special type of material which is characterised by its unique sintering properties when fired at 1100 °C (i.e. sintering 100 °C lower than ordinary stoneware). Due to this property, this clay (together with black-brown variant no. 12 and red-brown no. 18) is recommended for the production of utility ceramics using low-temperature glazes of the PD and PK series. Due to its light colour, the glazes stand out well on it, their colour is not distorted even with semi-transparent glazes. The quality of the clay as well as the packaging corresponds to the high standard of all German Witgert ceramic clay.
Witgert masses are well packed in a strong PE bag secured with an aluminium clip. They can be easily transported and the clasp on the packaging can be re-closed with pliers when the required quantity is removed. Witgert ceramics are produced using wet or semi-dry technology (flakes). They are not made from dry powdered or granulated mixtures, which avoids the hardening that is common with such materials, which occurs after a certain period of storage even without breaking the packaging.
For long-term storage of our ceramic clays, we recommend placing them in a low-heated area (garage, basement, etc.) without the risk of freezing, put them in a black bag and tie them up. The absence of light will prevent the formation of mould. Stored in this way, the materials have a virtually unlimited shelf life.
|Recommended firing||1000 - 1150°C|
|Chamotte content||without chamotte|
|Type of matter||pore|
|Colour||cream grey to white|
|Shrinkage during drying||5,9%|
|Firing shrinkage by 1000°C||0,4%|
|Firing shrinkage by 1100°C||6,7%|
|Water absorption by 1000°C||17,2%|
|Water absorption by 1100°C||2,3%|
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