Vacuum packing is a method of packaging that removes air from the Al foil bags prior to sealing. This method involves placing items in an Aluminum foil package and removing air from inside and sealing the package. The intent of vacuum packing is usually to remove air from the vacuum bag to extend the shelf life of products with flexible package forms. This packaging method is used to protect product from the corrosion or the rust.
It is preferred for the seaworthy and Export shipments which takes months to reach the destination through sea where the humidity is maximum. High humidity in the atmosphere causes the rusting to the product. Vacuum packing prevents the product from oxidation by establishing the layer of thin film in between the atmosphere and product.