Its brownish-yellow body was sealed and made waterproof at the first firing by a transparent lead glaze on the back, then before a second firing a tin glaze was added to the front to give an opaque white base which could also be overlaid with colors.
它底敷鉛釉，胚燒後再上錫釉變成不透明白底，經二次燒窯，可畫上各種明亮的色彩。