Multilayer Procedure: the addition of the plastic film was the first step to create brick containers impermeable to liquids and heat-sealable. During the nineteen sixties, an aluminum foil began to be extra into the cardboard container to be sure superior security and increase the shelf lifetime of the packaged products. https://gabletopcartons.fashion.blog/2025/02/25/gable-top-pak-crafting-a-sustainable-legacy-with-every-pak/