Multilayer process: the addition of a plastic film was the initial step to create brick containers impermeable to liquids and warmth-sealable. From the nineteen sixties, an aluminum foil began to be added to your cardboard container to be sure improved protection and lengthen the shelf life of the packaged solution. https://waterintetrapak.blogspot.com/2025/08/carton-innovation-redefining-freshness.html