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/35-40'C.
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.