Multilayer Method: the addition of a plastic film was step one to generate brick containers impermeable to liquids and warmth-sealable. Within the nineteen sixties, an aluminum foil started to be additional on the cardboard container to be sure much better defense and lengthen the shelf life of the packaged merchandise. https://topcartons.fitness.blog/2024/10/29/embracing-eco-friendly-packaging-with-gable-cartons/