Iitreyi zamaqanda zibhekisa kwizixhobo zokupakisha ezisetyenziselwa ukubamba amaqanda, amaqanda edada kunye nezinye iimveliso zeqanda.Umsebenzi ophambili kukufunxa umothuko, uququzelele ukubekwa kweqanda, kwaye wenze ukuthuthwa kweqanda kube lula ngakumbi, kukhuselekile kwaye kukhawuleze.Iitreyi zamaqanda zeplastiki zinokwahlulwa zibe ziitreyi zeplastiki zeqanda kunye neebhokisi zeqanda ezicacileyo zePVC ngokuxhomekeke kwimathiriyeli ekrwada evelisiweyo.