Multilayer System: the addition of the plastic movie was the initial step to make brick containers impermeable to liquids and warmth-sealable. In the nineteen sixties, an aluminum foil started to be extra for the cardboard container to ensure better defense and prolong the shelf life of the packaged products. Now https://share.evernote.com/note/a33f5123-cae0-0d4e-0d4f-ed5a266a57f8