Multilayer Process: the addition of the plastic movie was step one to produce brick containers impermeable to liquids and heat-sealable. Inside the sixties, an aluminum foil started to be included on the cardboard container to make certain better security and extend the shelf lifetime of the packaged product. This method https://share.evernote.com/note/b0a0ca9c-9d1b-7129-6089-9b3a7535c26c