Multilayer technique: the addition of the plastic film was step one for making brick containers impermeable to liquids and heat-sealable. Inside the 1960s, an aluminum foil started to be additional to the cardboard container to be sure far better safety and increase the shelf lifetime of the packaged item. End https://gablecarton.game.blog/2024/09/12/gabletop-pak-the-ultimate-solution-for-beverage-packaging/