Multilayer system: the addition of a plastic movie was the initial step for making brick containers impermeable to liquids and heat-sealable. In the nineteen sixties, an aluminum foil began to be extra on the cardboard container to make certain superior security and prolong the shelf lifetime of the packaged item. https://gablecarton.video.blog/2025/08/10/the-packaging-industry-has-been-changed-by-water-in-sustainable-pak/