Multilayer method: the addition of a plastic movie was the initial step to help make brick containers impermeable to liquids and heat-sealable. Inside the sixties, an aluminum foil began to be extra for the cardboard container to make sure better protection and lengthen the shelf lifetime of the packaged product. https://gablecarton.business.blog/2025/02/07/innovative-eco-friendly-packaging-solutions-for-a-sustainable-future/