Multilayer process: the addition of the plastic movie was the initial step to generate brick containers impermeable to liquids and heat-sealable. Within the 1960s, an aluminum foil started to be added into the cardboard container to make certain far better safety and extend the shelf lifetime of the packaged products. https://liquidsoappackage.blogspot.com/2025/09/gable-carton-classic-design-modern-eco.html