Ubukhulu be-aluminium foil esetshenziselwa ukupakishwa kwemithi bungahluka kuye ngezidingo ezithile zephakheji kanye nokuqukethwe.. Ngokuvamile, ucwecwe lwe-aluminium enogqinsi olusukela 0.02 ku 0.025 mm (20 ku 25 microns noma 2 ku 2.5 imis) ingasetshenziselwa ukupakishwa kwemithi.

Ukukhetha ubukhulu be-foil ngaphakathi ukupakishwa kwemithi kuncike ezintweni ezifana nezakhiwo zokuvimbela, isidingo somswakama, ukukhanya nomoya-mpilo ukuvikelwa, kanye nokuhambisana nomkhiqizo wokwenza imithi. Ama-foil aminyene anezakhiwo ezingcono zokuvimbela futhi avame ukusetshenziselwa imikhiqizo ezwela umswakama nomoya-mpilo, njengemithi ethile kanye nemishini yezokwelapha.

Imithetho yokupakishwa kwemithi kanye namazinga angahluka ngendawo, futhi izidingo ezithile zinganqunywa uhlobo lomuthi opakishwayo.