1. underglaze - Noun
2. underglaze - Adjective
3. underglaze - Verb
Applied under the glaze, that is, before the glaze, that is, before the glaze is put on; fitted to be so applied; -- said of colors in porcelain painting.
Source: Webster's dictionaryComposite body, silicate coat, transparent glaze, underglaze painted. Source: Internet
Underglaze may be applied by brush strokes, air brush, or by pouring the underglaze into the mold, covering the inside, creating a swirling effect, then the mold is filled with slip. Source: Internet