Unglazed pottery: Why is the underside of handmade pottery unglazed?

Why is the underside of handmade pottery unglazed?

Why is the underside of handmade pottery unglazed?

Why is the underside of handmade pottery unglazed? Typically pottery made in factories are completely glazed, while handmade studio pottery often has an unglazed bottom. Glaze begins as a fine power applied to the surface of the pot, which melts when heated (1800-2400 degrees f). Any place where the glaze touches anything will become fused to the glaze once it is cooled. So if a pot is not stilted it will ‘become one with the shelf’! To solve the problem, industrial pottery is fired on stilts, allowing the entire piece to be glazed. Studio potters solve the problem by not glazing the bottom of the pot. Bare clay does not adhere to the shelf when firing.