For a Hybrid, Silverman and his assistant Roger will first cast a pot and let it dry, then paint a band of silicon carbide around it. “We fire it once and glaze it, then fire it again. The silicon carbide causes a gas to form under the glaze that makes it bubble. When the piece comes out of the kiln, we grind off the top of the bubbles so what you’re seeing is the back of the bubbles. Depending on how thick the glaze is, sometimes the bubbles are thicker, and sometimes they’re tiny,” says Silverman.