Ball clays or plastic clays are fine grained, highly plastic sedimentary clays, which fire to a light or near white colour. They are used mainly in the manufacture of ceramic whiteware and are valued for their key properties of plasticity, unfired strength and their light fired colour.
PHYSICAL PROPERTIES
Green MOR : Min 8.00 Kg/Cm2
Dry MOR : Min 17.00 Kg/Cm2
Fired MOR : Min 200 Kg/Cm2F
ired Shrinkage %: 7.0+/- 1.0
Fired Color Value @ 1200 DEG C
L* 90.0+/-2.0
a* 1.0+/-0.5
b* 8.00+/-1.5
CHEMICAL ANALYSIS
SiO2 57+/-2.00
Al2O3 29+/-2.00
Fe2O3 0.80+/-0.30
TiO2 0.70+/-0.30
CaO <0.5
MgO <0.5
k2O 1.20+/-0.30
Na2O <0.5
LOI 12.50+/-1.00
