Multilayer system: the addition of the plastic film was step one to produce brick containers impermeable to liquids and warmth-sealable. In the sixties, an aluminum foil started to be extra on the cardboard container to ensure improved safety and increase the shelf life of the packaged product or service. This https://liquidsoappackagingsolutions.blogspot.com/2025/10/liquid-soap-packaging-innovative-gable.html