Special Porcelain 12.5kg
A very smooth, high quality white porcelain clay. Containing fine white clays with a bentonite addition.
Suitable for modelling, hand building, throwing and casting.
Firing temperature range: 1220 - 1280°C
Supplied in 12.5kg bags. This is not air drying clay.
Warning - this products contain crystalline silica - If the product is allowed to dry, any powder product generated is hazardous to health by inhalation. Excessive and repeated inhalation of quartz over a prolonged period can cause chronic lung damage.
Technical Information:
Si02%: 66.08
Ti02%: 0.03
AL203%: 22.47
Fe203%: 0.40
P205%: 0.10
Ca0%: 0.37
Mg0%: 0.27
K20%: 3.36
Na20%: 1.17
Total Contraction 1200°C: 15.50%
Pre Fired Total: 1220
Thermal Expansion 500°C: 0.326, 600°C: 0.447
Texture (1=smooth, 10=Coarse): 1
Fired Colour: Very White
Casting slip recipe*:
- 12.5kg bag of Special Porcelain
- 2 Litres of water
- 12.5g Sodium Silicate 140s
*This is a suggested recipe and you may need to adjust it for your own requirements and preferences.
We have pre-made slip available to buy - please email shop@rca.ac.uk if you're interested.
Please note this is not air-drying clay.