Granite - San Francisco

Gray clay with black specks resembles a stone. Excellent for small to medium wheel throwing and handbuilding.

Characteristics
Cone: 10
Wet Color: Gray
Firing Color: Oxidation: Lt. Gray Specks / Reduction: Gray Specks
Texture: Slightly Coarse
Penetrometer Target: 7
Avg. Shrinkage 2±%: 11.8%
Avg. Water Absorption 1±%: 1.4%
COE x 10-6: 4.625