What is the primary characteristic of glaze ware?

The primary characteristic of glaze ware is that it is clay that has been fired twice. This process involves an initial firing known as bisque firing, which transforms the clay into a hard, porous ceramic. After this initial firing, a glaze—a liquid mixture that can contain various minerals and colorants—is applied to the surface. The piece is then fired a second time, which melts the glaze, forming a vitreous (glass-like) surface that enhances both durability and aesthetic appeal. This two-stage firing process is essential for achieving the non-porous, colorful, and often shiny finish that distinguishes glaze ware from other ceramics.

In contrast, firing clay just once provides a more fragile product, while mixing clay with water creates a workable material but does not relate to the glazing process. Additionally, characterizing clay as solely decorative does not capture the functional qualities imparted by glazing, which is integral to the art of ceramics.