Multilayer Procedure: the addition of the plastic film was the initial step to generate brick containers impermeable to liquids and heat-sealable. Inside the sixties, an aluminum foil began to be extra to the cardboard container to make sure much better safety and lengthen the shelf lifetime of the packaged merchandise. https://sustainablewaterpackaging.car.blog/2025/02/07/gable-top-boxes-revolutionizing-sustainable-packaging/