Multilayer method: the addition of a plastic film was the initial step for making brick containers impermeable to liquids and warmth-sealable. In the 1960s, an aluminum foil started to be extra into the cardboard container to be sure improved protection and prolong the shelf lifetime of the packaged merchandise. This https://customgablecarton.blogspot.com/2025/10/plastic-free-water-in-paper-pak.html