Ithusi liqukethe u-3% kuya ku-14%. Ngaphezu kwalokho, izakhi ezifana ne-phosphorus, i-zinc, nomthofu zivame ukungezwa.
Yingxubevange yokuqala eyasetshenziswa abantu futhi inomlando wokusetshenziswa cishe iminyaka eyizi-4,000. Iyakwazi ukumelana nokugqwala futhi ayigugi, inezinto ezinhle zokusebenzisa imishini nezinqubo, ingashiselwa futhi iboshwe kahle, futhi ayikhiqizi izinhlansi ngesikhathi somthelela. Ihlukaniswe ngethusi elicutshungulwayo kanye nethusi eliwuthayela.