Multilayer procedure: the addition of a plastic movie was the initial step to make brick containers impermeable to liquids and warmth-sealable. During the sixties, an aluminum foil started to be additional towards the cardboard container to make certain far better protection and increase the shelf life of the packaged solution. https://gabletopcartons.fashion.blog/2024/10/05/sustainable-packaging-gable-top-cartons-as-a-game-changer/