Multilayer process: the addition of the plastic movie was step one to make brick containers impermeable to liquids and heat-sealable. During the 1960s, an aluminum foil started to be added for the cardboard container to guarantee improved security and increase the shelf life of the packaged merchandise. This can make https://mineralwaterinbox.blogspot.com/2025/04/how-gable-top-cartons-and-paper-water.html