Chemical knowledge × Keywords: Waterproofing
2 jobs found.
Persimmon Tannin Manufacturing Worker
Traditional manufacturing occupation that uses astringent persimmons as raw material to ferment and age them into persimmon tannin, which is then processed as a natural paint or preservative and waterproofing agent.
Impregnated Paper Maker
A job that impregnates paper materials such as pulp with resin or chemicals to produce impregnated paper with enhanced strength and water resistance.