Nonglazed

Nonglazed refers to ceramic ware that has not been coated with glaze. In pottery, glaze is a vitreous coating fused to the surface during a second firing, which provides a glassy, waterproof finish. Nonglazed ware retains its raw clay surface or a slip-coated layer and is often described as matte or rustic in appearance.

Its surface characteristics depend on the clay body and finishing techniques. Nonglazed surfaces are typically porous and absorbent, with textures ranging from rough to smooth depending on burnishing or scraping. Color is determined by the clay rather than glaze, and unglazed wares are usually less reflective than glazed ones.

Firing temperature and clay type influence porosity and strength. Generally, nonglazed wares are associated with lower-fired earthenware or stoneware with minimal glazing; some high-fired wares may be intentionally unglazed for a natural finish. Traditional forms include terracotta, slipware, and certain hand-built or sculptural pieces.

Uses and care: Nonglazed pottery is common in rustic or utilitarian objects, tiles, and architectural elements where slip resistance or a tactile surface is desired. Because unglazed surfaces are porous, they can stain or absorb liquids and are more susceptible to wear. Finishes such as wax or oil can be applied in some cases to alter color or reduce porosity, but sealing changes breathability and may affect safety for food use. Cleaning requires gentler methods to avoid surface damage.

Historical context: Before the widespread use of glazes, many cultures produced unglazed wares. Even after glazes became common, nonglazed finishes remained popular for certain aesthetics and functional purposes. Modern ceramists sometimes employ unglazed surfaces to emphasize texture or to achieve a matte, natural look.