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Black ceramic clay no. 9 sf (1000-1200°C)



Black stoneware No. 9 sf is characterised by its attractive extra black colour already when fired at 1100 °C.

Basic price for purchase of 10–990 kg per quality.

10% discount for purchases from 1 tonne per quality.

More details

Total incl. VAT

0,92 €


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Black stoneware No. 9 sf is characterized by its attractive extra black color already when fired at 1100 °C. Another advantage of this clay is the absence of brown stone, which is often used by manufacturers for darkening masses and can irritate the skin of sensitive persons. Therefore, this dark mass can be used in hobby or school workshops without any problem. The quality of the mass as well as the packaging corresponds to the high standard of all German Witgert ceramic masses.

Witgert clays are well packed in a strong PE bag secured with an aluminium clip. They can therefore be easily transported and the clips 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 practically unlimited shelf life.

Data sheet

Recommended firing1000 - 1200°C
Chamotte content25% of chamotte size 0 - 0,5 mm
Type of matterstoneware
Colourbrown and black
Shrinkage during drying7,5%
Firing shrinkage by 1000°C1,7%
Firing shrinkage by 1100°C5,3%
Firing shrinkage by 1200°C6,1%
Water absorption by 1000°C13,3%
Water absorption by 1100°C7,2%
Water absorption by 1200°C3,7%

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