| 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： |
pure rubber/1/8 oz
paraffin wax/2/5 oz
benzol/13 oz
carbon tetrachloride/to make 1 gal
gum dammar/1 1/5 oz
waterproofing liquid |
| 配制方法： |
dissolve the rubber in the benzol, add the other ingredients, and allow to dissolve. |
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