Multilayer program: the addition of the plastic film was the initial step to generate brick containers impermeable to liquids and heat-sealable. During the nineteen sixties, an aluminum foil began to be extra to the cardboard container to ensure greater protection and prolong the shelf life of the packaged merchandise. End https://sustainablemilkcarton.blogspot.com/2024/10/exploring-versatility-of-gable-top.html