“In both of these cases, a crackle glaze has been applied over a glossy black glaze. When the glaze cracks in the kiln, it slides around a lot and then stays in place when it cools. The thicker the application, the more the glaze moves around. Things like this involve a lot of trial and error, a lot of caveman action, and a lot of kiln cleaning. You can see the one on the left has what look like little feet: That’s from the glaze running down and sitting on the kiln shelf.”