Multilayer technique: the addition of a plastic film was the first step to create brick containers impermeable to liquids and warmth-sealable. From the 1960s, an aluminum foil started to be extra for the cardboard container to guarantee much better safety and extend the shelf lifetime of the packaged products. The https://cartongabletoppackaging.blogspot.com/2025/02/the-role-of-gable-top-cartons-in.html