White earthenware clay with 20% fine grog 0-0.5 mm (up to 35 Mesh).
Ideal for medium size pieces.
The presence of provides a nice textured finish (not flat) which also provides additional strength reducing deformation and cracking from occurring.
Available in extruded body (moist form), being suitable for shaping and modelling.
Firing range* (biscuit): 1050-1080ºC / Cone 05-04
Water content (throwing): 17%
Plasticity (IP Atterberg): 12
Carbonate content (CaCO3): 13%
Drying shrinkage: 5.6%
Firing shrinkage 1050ºC: -0.1%
Porosity (water absorption) 1050ºC: 11.2%
Dry bending strength: 3.7 N/mm2
Fired bending strength 1050ºC: 21.0 N/mm2
Thermal coefficient 1050ºC (25-500ºC): 68.1x10^-7ºC^-1
(*) Firing range recommended for the clay to develop its best performance, both in terms of technical and safety characteristics, under conventional firing conditions. The colour samples may show temperatures outside the recommended range to provide a broader view, but these are pieces fired under controlled conditions. Cone equivalence according to Orton table for self-supporting cones, regular-SSB and 150ºC/hr heating rate.