Multilayer System: the addition of a plastic film was step one for making brick containers impermeable to liquids and heat-sealable. In the nineteen sixties, an aluminum foil started to be additional on the cardboard container to guarantee improved protection and prolong the shelf life of the packaged product or service. https://gabletopsoappackagings.blogspot.com/2025/02/the-role-of-gable-top-cartons-in.html