Overglaze 上釉

It is used to describe enamel decoration on the surface of a glaze that has already been fired. Once painted, the porcelain ware would be refired again, usually at a lower temperature.

Gourd-shaped Vase with Interlocking Lotus and Chinese "Longevity" (Shou) Characters in Contrasting Colors Qianlong Reign (1736-1795), Qing Dynasty (1644-1911) The Palace Museum

Dou cai 斗彩

The most highly prized technique is dou cai (斗彩) (“contrasted” colors) which is first produced during the Ming Emperor Xuande’s (1426-35) period and reached its zenith during the reign of Chenghua (1465-87). In this process the pattern was first outlined using cobalt. The piece was then glazed and fired at a high temperature.

Overglazed colors were subsequently applied to complete the design and the piece was fired again at a lower temperature.

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