Multilayer procedure: the addition of a plastic movie was the first step to create brick containers impermeable to liquids and heat-sealable. From the 1960s, an aluminum foil started to be added towards the cardboard container to make sure better safety and prolong the shelf life of the packaged item. The https://gabletopmilk.blogspot.com/2025/03/gable-top-carton-manufacturers-gabletop.html