|Monthly Tech-Tip |
This happens on first fire for many bodies. Sulfur is an impurity in many ball clays and related stoneware and earthenware raw clays, it occurs as calcium sulfate (selenite, the same mineralogy as plaster). Different sources indicate wider and narrower ranges for this, it is difficult to establish exactly.
Sulfur Dioxide Toxicity
This gas can be produced when clays are fired in a kiln. What can you do?
Sulfur at Wikipedia
A transparent crystal form of the mineral gypsum. This can occur in clays and is the cause of efflor
|By Tony Hansen|
Follow me on