Kev Siv Tseem Ceeb: Raws li cov khoom siv tshuaj raw khoom, tshuaj tua kab thiab zas xim nruab nrab, thiab kev lag luam kho dej.Hauv cov tshuaj, nws yog siv los tsim cov tshuaj kho mob ntshav qab zib thiab tshuaj sulfa.Nws kuj tseem siv tau los extract guanidine ntsev cov khoom, thiourea, nitrocellulose stabilizer, roj hmab vulcanization accelerator, steel nto hardener, luam ntawv thiab dyeing kho tus neeg saib xyuas, nplaum, hluavtaws detergent, compound fertilizer thiab decolorizing flocculant, thiab lwm yam.