Multilayer procedure: the addition of a plastic film was step one to help make brick containers impermeable to liquids and warmth-sealable. In the 1960s, an aluminum foil began to be added towards the cardboard container to make certain far better security and lengthen the shelf lifetime of the packaged product https://paperbottlemanufacturer.blogspot.com/2025/06/green-sips-for-better-tomorrow.html