Abstract: A polymeric film having a translucent first layer of polymeric material, a transparent second layer of polymeric material on at least one surface of the first layer, and an adherent layer comprising an acrylic resin on the surface of the second layer remote from the first layer is disclosed. Both the first and second layers are preferably formed of biaxially oriented polyethylene terephthalate. The first layer contains an inorganic filler opacifying agent. The polymeric film is particularly suitable for use as an upper sheet in a re-usable label employing the "magic slate" principle.

Abstract: A method of producing a composite film by forming a substrate layer of polymeric material having an at least one surface a heat-sealable layer and applying a particulate additive to the exposed surface of the heat-sealable layer with the particulate additive bonding to and/or penetrating into the heat-sealable layer.The exposed surface of the heat-sealable layer has greater than 100 surface protrusions per mm2 produced by the particulate additive. The surface protrusions have an average peak height in the range from 5 to 400 nm measured from the average level of the surface of the heat-sealable layer.