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:
starch/1 soda ash/87 tannic acid/2 trisodium phosphate/10 boiler compound
配制方法:
use powders, mix well, and then pass through a fine sieve.
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