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Raw lacquer film was etched by aqueous solution of NaOH so as to simulate the corroded raw lacquer film on ancient lacquerwares. 用氫氧化鈉水溶液對天然生漆漆膜進行腐蝕，以模擬已被腐蝕的古代漆器漆膜，再用矽酸乙酯對已被腐蝕的生漆膜進行化學脩複。