What component is typically included in glaze to enhance its properties?

The inclusion of metal oxides in glaze is crucial for enhancing its properties. Metal oxides serve multiple functions in ceramic glazes, including providing color, improving stability, and affecting the melt and flow during the firing process. For instance, different metal oxides can yield a variety of colors in the glaze, depending on the firing temperature and atmosphere. Oxides such as copper produce greens and reds, while cobalt yields deep blues. Furthermore, metal oxides can influence the texture and finish of the glaze, contributing to its overall aesthetic and functional qualities.

In contrast, organic materials are not standard components of glazing because they can burn out during the firing process, potentially affecting the final product. Pigments can add color but are typically considered separately from the essential glaze formulation. Pewter is an alloy primarily associated with metals and does not have a role in traditional glaze composition. Thus, the incorporation of metal oxides is a fundamental aspect of glaze formulation that enhances both its visual and physical characteristics.