Ikhoyili yealuminiyam eqatywe ngombala ikwabizwa ngokuba yiKhoyili yealuminiyam epeyintwe kwangaphambili.Njengoko igama libonisa, kukupenda kunye nombala we-aluminium substrate.Ngokuqhelekileyo zisetyenziswa yi-coil ye-aluminiyam efakwe umbala we-fluorocarbon kunye ne-polyester efakwe umbala we-aluminium coil.