Multilayer process: the addition of a plastic movie was the first step to make brick containers impermeable to liquids and warmth-sealable. Inside the nineteen sixties, an aluminum foil began to be additional into the cardboard container to guarantee far better safety and extend the shelf lifetime of the packaged product. https://sustainableoilpackagingrecyclable.blogspot.com/2025/03/gable-carton-gabletop-paks-sustainable.html