Multilayer System: the addition of a plastic film was the first step to create brick containers impermeable to liquids and warmth-sealable. In the sixties, an aluminum foil started to be additional towards the cardboard container to be sure superior defense and extend the shelf lifetime of the packaged item. Final https://share.evernote.com/note/092a2d9b-9bbe-5b73-1d68-c788b997f84b