Tin-glazing is the process of giving ceramic items a tin-based glaze which is white, glossy and opaque, normally applied to red or buff earthenware. The opacity and whiteness of tin glaze encourage its frequent decoration with colour.

Tin-glazed pottery is pottery covered in glaze containing tin oxide which is white, shiny and opaque. (See tin-glazing.) The pottery body is usually made of red or buff colored earthenware and the white glaze was often used to imitate Chinese porcelain. Tin-glazed pottery is usually decorated, the decoration applied to the unfired glaze surface by brush as metallic oxides, commonly cobalt oxide, copper oxide, iron oxide, manganese dioxide and antimony oxide. The makers of Italian tin-glazed pottery from the late Renaissance blended oxides to produce detailed and realistic polychrome paintings.