When I am putting bone dry clay in water to get it to turn into slip or to reclaim it, it can make a fizzing sound.
I also hear this fizzing sound if there is a little bit of clay left on the middle of a bat that had been wired off and I put water on it.
I had a piece that I made that was kind of close to bone dry, but the rim warped a little due to what I left it to dry on. I decided to try to keep spraying it with water and see if I could get it workable again to round out the rim. I was able to do so after carefully spraying and coming back and spraying again. Near the end of this, around when I started to get plasticity in the rim, I was getting bubbles in that part of the clay. I'm assuming that this is the same as the fizzing that I hear when slaking down clay. What's going on?