Abstract: There is described a method of manufacturing a security article, said method comprising the steps of: introducing into a printing device a discrete sheet of transparent film comprising a non-fibrous substrate layer of regenerated cellulose; disposing an opacification layer on at least a portion of at least one surface of said film by a first printing step; and disposing printed information on at least a portion of said opacification layer by a second printing step wherein said second printing step is an offset printing step.

Abstract: There is described the use of a transparent film comprising a non-fibrous substrate layer of regenerated cellulose in the manufacture of a security article exhibiting printed information, wherein said transparent film is the material on which printed information and optionally one or more other security feature(s) is disposed, and wherein said transparent film exhibits one or more, and preferably all, of the following properties: haze of no more than 10%, preferably no more than 5%, preferably no more than 4%, preferably no more than 2.5%; birefringence of from about 400 to about 800 nm; a surface energy of at least about 38 dynes, preferably at least about 40 dynes, preferably at least about 42 dynes, and preferably no more than from about 60 dynes; and a water vapour permeability in the range of from about 20 to about 40, preferably from about 25 to about 35, preferably from about 28 to about 32 g/m2/24 hours at 25° C.

Abstract: There is described a method of manufacturing a security article, said method comprising the steps of: introducing into an offset printing device a transparent film comprising a non-fibrous substrate layer of regenerated cellulose; disposing an opacification layer on at least a portion of at least one surface of said film by a first offset printing step; and disposing printed information on at least a portion of said opacification layer by a second offset printing step.

Abstract: There is described a method of manufacturing a security article, said method comprising the steps of: introducing into an offset printing device a transparent film comprising a non-fibrous substrate layer of regenerated cellulose; and disposing printed information on at least a portion of said transparent film by an offset printing step, wherein said transparent film introduced into said offset printing device further comprises an ink-receptive layer on at least one surface of said substrate layer.