Multilayer procedure: the addition of the plastic film was step one to help make brick containers impermeable to liquids and heat-sealable. From the 1960s, an aluminum foil started to be additional to the cardboard container to ensure better defense and extend the shelf life of the packaged merchandise. The pattern https://sustainablewaterpackaging.blogspot.com/2024/09/how-gabletop-pak-is-leading-way-in-eco.html