Multilayer program: the addition of the plastic film was the initial step to generate brick containers impermeable to liquids and warmth-sealable. Within the 1960s, an aluminum foil began to be extra on the cardboard container to guarantee better safety and prolong the shelf life of the packaged products. Using this https://share.evernote.com/note/73fc965c-f885-860f-4da4-b553e65af2f4