Ukuveliswa kwe-dyestuffs kuya kuvelisa amanzi amdaka, kwaye amanzi amdaka aya kuba ne-asidi, i-alkali, ityuwa, isinyithi esinzima kunye nezinye izinto eziyingozi.Ngoko ke, unyango lwedayi yamanzi amdaka luyimfuneko, olunokunciphisa ngokufanelekileyo ukungcoliseka kwendalo, ukuphucula indawo yokuhlala yomntu ...
Funda ngokugqithisileyo