Overglaze

by Sam Scott

An accent colorant used in brushwork and small areas, applied over an already glazed piece. In some cases, the glazed piece has already been fired, and the piece is refired to a lower temperature (cone 016 or lower) to bond the overglaze on. These underglazes are well suited for exact silk-screen, stencil and decal applications, but may be less permanent and durable due to the low temperature bond. In other cases, overglazes are applied to glazed but unfired work, then typically high-fired. These overglazes become integral with the glaze, and decorations may bleed and flow with the glaze during firing.