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:
glycerin/5 oz sponge the hat with a soluton of alcohol/10 oz water/75 oz sodium hyposulfite/10 oz lay the hat aside in a damp place for 24 h and then apply a mixture of citric acid/2 oz straw-hat cleaner alcohol/10 oz water/90 oz
地址：山东省烟台市开发区南昌大街48号
