Terracotta Red Clay 12.5kg (Standard)
General purpose red terracotta clay, with a medium texture. Based on a blend of Etruria Marls.
Grogg has been added to this clay body (20%) which improves strength in throwing, as well as increases resistance to cracking and warping, especially on larger pieces.
Firing temperature range: 1080 - 1180°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%: 57.38
Ti02%: 1.23
AL203%: 22.78
Fe203%: 7.37
P205%: 0.09
Ca0%: 0.57
Mg0%: 0.86
K20%: 1.60
Na20%: 0.10
Total Contraction 1100°C: 12.30%
Pre Fired Total: 1100
Thermal Expansion 500°C: 0.319, 600°C: 0.455
Texture (1=smooth, 10=Coarse): 5
Fired Colour: Light-Dark Red
Casting slip recipe*:
- 12.5kg bag Standard Red Terracotta
- 2 Litres of water
- 7g Soda Ash
- 19.4g Sodium Silicate 140s
*This is a suggested recipe and you may need to adjust it for your own requirements and preferences.
This is not air-drying clay.