Multilayer Process: the addition of the plastic film was step one to generate brick containers impermeable to liquids and heat-sealable. While in the nineteen sixties, an aluminum foil started to be additional for the cardboard container to be sure greater safety and lengthen the shelf life of the packaged product. https://gabletopcartonjuice.blogspot.com/2025/01/the-versatility-and-sustainability-of.html