Isithando somlilo esishisa kakhulu siwucezu olukhethekile lwemishini eklanyelwe ukumelana namazinga okushisa aphakeme futhi ihlinzeke ngendawo yokushisa elawulwayo yezinqubo ezihlukahlukene zezimboni.Izithando zokushisa eziphakeme zidlala indima ebalulekile ekusetshenzisweni kokwelapha ukushisa okufana nokufaka i-annealing, brazing, sintering and tempering. Zenza kube lula ukuguqulwa kwezinto ezingavuthiwe zibe imikhiqizo eqediwe enezakhiwo ezithuthukisiwe zemishini kanye nobuqotho besakhiwo obuthuthukisiwe.