The chemical compositions and microstructures of the coatings and glazes of the 4 stageshave distinctive features, particularly, in that as the main flux of the glaze RO (CaO+MgO) contents show distinct and regular changes.

• 这4个阶段在釉的化学组成上和显微结构上都有明显的差别,特别是作为釉的主要熔剂的ro(CaO+MgO)的含量有着明显的有规律的变化。