Multilayer program: the addition of a plastic movie was the initial step to make brick containers impermeable to liquids and warmth-sealable. While in the sixties, an aluminum foil began to be additional into the cardboard container to ensure greater defense and prolong the shelf life of the packaged solution. Consequence https://share.evernote.com/note/6fbe321e-0002-795d-0d05-fc4272495718