| 配方类型： |
ELEMENTARY Preparations |
| 配方说明： |
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/2.0
starch/6.6
sugar/0.6
water/90.5
caustic soda/0.1
oil-and graseproofing, paper and fiberboard
sodiun salicylate/0.2 |
| 配制方法： |
the caustic soda is dissolved in the water. then the starch is made into a thick paste by adding a portion of this solution. the paste is then added to the water.the resulting mixture is placed on a water bath and heated to about 85 C,until alltje starch grantles have broken. the temperature is maintained aout 1/2 h longer adt 85 C. the other substances are then added and thoroughly mixed. less water may be used if applied hot and tdhen a thicker coating eill result. |
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