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配方類型：	MISCELLANEOUS
配方說明：	Lead Sulfide Mirror
配方組成：	Water/24 3. Thiourea/1 2. Caustic soda/4 1. Lead acetate/1 Water/48 Water/32
配制方法：	Four parts of Solution 3 and 1 part of Solution 1 are mixed, after which one part of Solution 2 is added. This is applied immediately to the cleaned surface.

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