Multilayer program: the addition of the plastic movie was the initial step to make brick containers impermeable to liquids and heat-sealable. Inside the nineteen sixties, an aluminum foil began to be included to the cardboard container to make certain greater defense and increase the shelf lifetime of the packaged products. https://wateringabletoppak.blogspot.com/2025/04/reshaping-packaging-with-eco-friendly.html