Multilayer program: the addition of a plastic film was step one to generate brick containers impermeable to liquids and warmth-sealable. From the sixties, an aluminum foil began to be extra to your cardboard container to be certain better protection and increase the shelf lifetime of the packaged product or service. https://share.evernote.com/note/c683562e-b29c-290b-e108-3aef974c977a