Multilayer technique: the addition of the plastic movie was the initial step to create brick containers impermeable to liquids and warmth-sealable. Inside the nineteen sixties, an aluminum foil began to be added to the cardboard container to make certain superior defense and extend the shelf lifetime of the packaged item. https://gabletoppackaging.tech.blog/2025/02/06/the-growing-trend-of-packaging-for-liquid-soap/