Ama-alloy wokugaya okushisa aphezulu angamathuluzi abalulekile enqubweni yomshini, ikakhulukazi ezimbonini ezisebenza ngama-alloys okushisa aphezulu. Laba bakusiki abakhethekile benzelwe ukumelana nokushisa okukhulu futhi banikeze ukusebenza okunembile kokusika. Nakhu amanye amaphuzu ayisihluthulelo okufanele akhumbule lapho usebenzisa izisiki zokugaya izinga lokushisa eziphezulu: