Multilayer procedure: the addition of the plastic movie was the initial step to help make brick containers impermeable to liquids and warmth-sealable. From the nineteen sixties, an aluminum foil started to be added for the cardboard container to guarantee better protection and increase the shelf life of the packaged product. https://waterintetrapak.fitness.blog/2025/02/07/the-rise-of-gable-top-cartons-in-packaging/