| 配方类型: |
MISCELLANEOUS |
| 配方说明: |
Improving the wearing Qualities of Toothbrushes (U.S. Patent 2,109,579) |
| 配方组成: |
Time/5-10 minutes "Aerosol OT"/0.1 G. Carbon Tetrachloride/1000 cc. Temperature/35-40C. Paraffin Wax/20 g. |
| 配制方法: |
The wearing qualities of toothbrushes made from hog bristles may be greatly improved by treating in this solution. |
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