Multilayer Program: the addition of the plastic movie was the initial step to generate brick containers impermeable to liquids and heat-sealable. Within the nineteen sixties, an aluminum foil started to be additional on the cardboard container to make certain better security and extend the shelf life of the packaged solution. https://share.evernote.com/note/b31fb28c-50e7-ac72-5294-5271f8d9105e