soaps are made fron a fat or fatty acid and an alkali. they lathetr and produce a foam which entraps dirt and grease. there are many kinds of soaps. cleaners contain a solvent, such as naphtha, with or without a soap. abrasive cleaners are soap pastes containing powdered pumice, stone, ailica, etc.
配方组成:
borax/1.75 ammonium sulfate/8.00 water/100.00 boric acid/3.00 fireproof paper
配制方法:
the ingredients are mixed together in a gall9on jug by shaking until dissikved.