铅白

qiān yán liào róng yì biàn huà yóu qí shì qiān dān zài guāng zhào gāo shī tiáo jiàn xià biàn chéng qiān bái

铅颜料容易变化，尤其是铅丹在光照高湿条件下变成铅白。

It is found that hematite and malachite are more stable to both light and moisture than lead pigments, especially red lead, which can change into white lead at high humidity with ultraviolet ray.