Multilayer Technique: the addition of the plastic film was the initial step to generate brick containers impermeable to liquids and warmth-sealable. In the sixties, an aluminum foil began to be added on the cardboard container to make sure better protection and lengthen the shelf life of the packaged products. Now https://topcartons.family.blog/2025/01/09/eco-friendly-packaging-the-future-of-sustainability-in-various-industries/