Plainsman Coffee | Dark Stoneware

Dark-burning, plastic cone 6 clay.

The body is made from 60% of Plainsman’s native A3 stoneware clay; to that they add kaolin, silica, bentonite, raw umber and talc. Raw umber is a natural soil/clay, so it has the same handling precautions as other clays.

Coffee contains approximately 0.5% of MnO. Maximum firing is cone 6, 2200F, beyond that manganese fumes will be released as raw umber decomposes, this will cause glaze pinholing (also, the fumes are hazardous, be sure to use proper kiln ventilation). Use cones to verify that your electronic controller or kiln sitter is not firing beyond cone 6.

Plainsman moist clays are water-based and packaged in a 20 kg (44 lb) box. Each box contains two individually bagged 10 kilogram pugged blocks. Plainsman Clays are ready to use out of the box, no preparation is required.

For more information, please visit Plainsman’s website.

 Price per box when you buy:

We try not to ship wet clay when we have freezing temperatures, but we cannot account for weather elsewhere on its journey. If you purchase wet clay in the winter months, you assume the risk of it freezing in shipment.