配方类型：	ELEMENTARY PREPARATIONS
配方说明：	3 min. Remove and allow to cool somewhat, wash in hot water, dry, and oil with mineral or linseed oil. B Then put the object in the following solution for 15 min:
配方组成：	Nitric Acid**/1/2 oz Iron Chloride/1 lb Water/1 gal *Inflammable Hydrochloric Acid*/4 oz Copper Sulfate/1/2 oz **Corrosive
配制方法：	Allow to dry for several hours. Place in a solution again for 15 min, remove and dry for 10 hr. Place in boiling water for 1/2 hr, dry, and scratchbrush very lightly. Oil with mineral or linseed oil and wipe dry.

返回数据库查询