Packaging code. Regenerated cellulose film, films made of plastics, aluminium foil, flexible multilayer structures and metallized materials|Coated materials, Permeability, Area, Marking, Composite materials, Thickness, Designations, Nitriles, Flexible materials, Heat-sealing, Foil, Storage, Dimensions, Polyethylene, Gloss (of surface), Polyesters, Polyvinyl alcohol, Impact strength, Selection, Polyvinyl acetate, Copolymers, Aluminium, Elongation at fracture, Laminates, Cellulose derivatives, Polystyrene, Specimen preparation, Sheet materials, Test equipment, Polyvinylidene chloride, Metal coatings, Density, Safety measures, Polyamides, Films (states of matter), Oil-resistance tests, Packaging materials, Strength of materials, Breaking load, Packaging, pH measurement, Test specimens, Tensile strength, Cellulose, Polyvinyl chloride, Polypropylene, Plastics