Multilayer program: the addition of a plastic film was step one for making brick containers impermeable to liquids and warmth-sealable. Inside the sixties, an aluminum foil began to be added on the cardboard container to make sure better defense and prolong the shelf life of the packaged product or service. https://customgabletopcartons.blogspot.com/2025/04/reshaping-packaging-with-eco-friendly.html