Isetshenziswa kabanzi kuwo wonke umkhakha wezimboni
I-metal skeleton assembly in the cavity izinzile ikakhulukazi futhi inembile (inothi: ukuvala uphawu okumile phakathi kwamaphethelo angaphandle ohlaka lwamathambo ensimbi kunqunyelwe lapho kuvalwa imidiya ye-viscosity ephansi namagesi).
Ngothuli - udebe olungenabufakazi, vimbela ukungcoliswa kothuli okuvamile nokuphakathi kanye nokuhlasela kokungcola kwangaphandle.