Firing clay with a high sulfur content will rust the kiln. If you cannot avoid this type of clay, be sure to install the Orton downdraft KilnVent. It removes the fumes and reduces kiln rust.

Another cause of rust is firing moist greenware. This slows down the firing, too, because burning off the moisture requires energy. A sign that you are firing moist greenware is water dripping from the kiln case. Before you decide to change elements because your kiln is firing so slowly, find out if moist greenware is the reason for the slow firing.

If for some reason you must fire moist greenware, use the Orton KilnVent. Again, it will help prevent rust, because it will draw the moisture from the kiln during candling.

With best wishes,

Copyright 2002, by Paragon Industries, Inc.