To solve the problems that mould stain showed up on some silk fabric collections in the warehouse of the Palace Museum,research was handled on cleaning methods of the mould stain.By investigating the current situation of the textile collections in the warehouse,the material of the objects and the ingredients of the dyestuff,and the environment and circumstance of the formation of the mould stain were found out.Many experiments have been done to clean the stone blue silk collections by using the improved typ...