PF/CHM grogged red 0-1.5mm 12.5kg

Red earthenware clay with 20% coarse grog 0-1.5 mm (up to 12 Mesh). Ideal for big size pieces. The presence of grog confers to the clay a very interesting textured surface (not flat) which, in turn, provides a set of suitable properties for the design of pieces in complex drying situations, thus avoiding the creation of deformations and cracks. Available in extruded body (moist form), being suitable for shaping and modelling.

Firing range*: 970-1055ºC / Cone 07-04
Water content (throwing): 19%
Plasticity (IP Atterberg): 14
Carbonate content (CaCO3): 8%
Drying shrinkage: 4.9%
Firing shrinkage 1000ºC: 0.3%
Porosity (water absorption) at 1000ºC: 14.3%
Dry bending strength: 5.6 N/mm2
Fired bending strength 1000ºC: 22.7 N/mm2
Thermal coefficient 1000ºC (25-500ºC): 73.2x10^-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.