Underglazes are decorative coatings used in pottery and ceramics that provide color and design before the final glaze is applied. They are typically made from a mixture of clay, water, and colorants, allowing artists to create intricate patterns and images on their pieces. Underglazes can be painted, stamped, or sprayed onto the surface of greenware or bisque ware. Once the underglaze is applied, the piece is fired in a kiln, which helps to set the colors. After this initial firing, a clear glaze can be added for a glossy finish and additional protection. This process enhances the vibrancy of the colors and ensures durability in the final product.