Potclays Buff School Clay

Potclays buff school clay	Potclays buff school clay, underfired
Potclays buff school clay	Potclays buff school clay

Pics from March 2020 firing – cone 10 down at front, softening at back, slow cooled in reduction.

Manufacturer: Potclays Ref 151-1120

Firing to a similar colour to 151-1117 (Buff stoneware), this more complex body formulation offers greater consistency and reliability. Outstanding and extremely well behaved general purpose clay based on fireclays, ball clay and china clay blend. Good dual purpose earthenware or stoneware use. Very poplar with production stoneware potters as a production stoneware body under oxidation or reduction and popular also in schools due to its tolerance. Smooth texture. Medium shrinkage. Fine speckle under reduction.

Recommended Firing Range 1100-1290C
Applications: General purpose / throwing / hand building / general domestic / slip casting.
Texture: 1 (1 smoothest, 10 most coarse)

Composition:

69% fireclay, 25% other clay.
6% #85 grog.
Shrinkage 10%@1100, 12%@1200
Thermal expansion 0.32%
Vitrification 1250 – 1290C
Firing 1110 - 1285