Multilayer process: the addition of a plastic film was step one to create brick containers impermeable to liquids and warmth-sealable. While in the sixties, an aluminum foil began to be extra for the cardboard container to be sure greater defense and extend the shelf life of the packaged solution. Now https://gabletopcartons.school.blog/2025/05/05/eco-friendly-soap-packaging-with-gable-top-solutions/