Gas permeable foil for packing food - is partly covered by layer of non permeable material applied in various patterns

摘要

The gas permeable packing foil which when faced with an appropriate material is used for packing food such as cheese. The foil is provided with a cover of a non-permeable material which is covered by a gas permeable layer. The non-permeable cover consists of a layer of varnish or metal or plastic and is placed on the foil in the form of strips or chess board pattern. The metallic cover consists of aluminium applied by a vacuum metallising method.