Multilayer program: the addition of the plastic film was the initial step to produce brick containers impermeable to liquids and warmth-sealable. Within the 1960s, an aluminum foil began to be extra for the cardboard container to make sure greater defense and prolong the shelf life of the packaged products. Gabletop https://share.evernote.com/note/be241deb-fab2-56f4-c932-801067d543c0