Coffee

Clay made from a base similar to H-450 with a powerful naturally-occuring pigmented clay. Easy to throw and accepts glazes very well. Contains manganese so, a kiln vent should be used during the firing. 

Characteristics:
Cone: 4-6
Wet Color: Dark Brown
Fire Color
                Oxidation Cone 6: Dark Brown
Texture: Smooth
Average Shrinkage
                Oxidation Cone 4: 5,5-6,5%
                                 Cone 6: 6,5-7,5%
Average Water Absorption
                Oxidation Cone 4: 5,0-6,0%
                                 Cone 6: 2,0-3,0%
COE x 10-6: N/A

* Protect from freezing.