A couple of pictures from the unloading of the salt kiln in Zion PA a few days ago. Gorgeous day! Great firing! The blue glazes came out really well. I’ve been working with some new ideas for creamers and gravy boats. The white balls of clay on the bottom of some of the pieces in the upper picture are called “kiln wadding”. They’re used in salt firing and some other types of firing to keep the piece from sticking to the shelf. That’s why some ceramics has a few pale spots on the bottom.
The wadding contains alumina, which is a highly refractory material. It helps it to resist the salt in the kiln’s atmosphere and allows it to be sort of a “nonstick” layer between the pot and the shelf.