I don't think it's any more toxic than usual. The only thing that is
different about the clay is that it has more water in it. Since the water
has not had time to evaporate, the clay that is being dried rapidly in the
warm kiln could crack, warp, or even explode. However, I have heard of
people successfully drying clay in a warm kiln with the lid open as you have
described. Explosions happen when you fire wet clay in the normal manner.
This is my, "I did teach ceramics for a while, but I'm not an expert,"
----- Original Message -----
From: "Meredith Steele" <firstname.lastname@example.org>
To: "ArtsEdNet Talk" <email@example.com>
Sent: Wednesday, October 08, 2003 12:18 PM
Subject: kiln firing question
Hi! I'm a painter and have a question about firing the kiln...
One of our new art teachers is firing the kiln "early" (the clay is still
wet) with the lid OPEN (held up with a small block).