配方类型：	METALS AND THEIR TREATMENT
配方说明：	coloring Zinc
配方组成：	Copper sulfate/50 grams/liter Ammonium chloride/80 grams/liter color until black and brush off black film to reveal antique brown surface. Alternate Method Ammonia/6 fl. oz/gal Double nickel salts/ 0.5 oz/gal copper sulfate/0.5 oz/gal Potassium chlorate/0.5 oz/gal Ammonium molybdate/4 oz/gal Phosphoric acid/26% by wt. Copper sulfate/6 oz/gal Potassium chloride/6 lz/gal Copper sulfate/42.5 grams/gal Potassium Chloride/42.5 grams/gal P

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