Multilayer Procedure: the addition of the plastic film was the first step to make brick containers impermeable to liquids and warmth-sealable. From the nineteen sixties, an aluminum foil began to be additional towards the cardboard container to make sure greater safety and extend the shelf lifetime of the packaged products. https://gabletoppak.school.blog/2024/12/05/gabletop-pak-revolutionizing-sustainable-packaging-solutions-for-a-greener-future/