Multilayer process: the addition of a plastic movie was step one to help make brick containers impermeable to liquids and heat-sealable. While in the 1960s, an aluminum foil began to be additional to your cardboard container to make certain improved safety and lengthen the shelf lifetime of the packaged item. http://cartongabletop.car.blog/2025/02/06/the-growing-trend-of-packaging-for-liquid-soap/