Well behaved clay with excellent properties. Good for oxidising and plain firing. Selected ball clay base and sand make Astra plastic and excellent for throwing.
Firing range: 1220 - 1280°C, Biscuit firing: 950 - 1000°C
Expansion at 500°C: 0.285
Total shrinkage: 11,5%
Firing colour: warm light brown.
Composition: 6 (1 = smooth - 10 = coarse)
Sand: 0-0,2mm
Package size: 12,5kg
