Multilayer process: the addition of the plastic film was the initial step for making brick containers impermeable to liquids and heat-sealable. During the 1960s, an aluminum foil started to be additional into the cardboard container to ensure much better security and prolong the shelf lifetime of the packaged products. Using https://gablecarton.video.blog/2025/04/09/why-gable-top-packaging-is-taking-over-modern-sustainable-markets/