| 摘要 |
The film (1) comprises a transparent replicating layer (2) with a diffractive relief structure (3) and/or a reflective layer, which is formed by a pigmented toner layer (4). The toner layer is directly adjacently arranged to the diffractive relief structure. A refractive index (n 1) of the toner layer and a refractive index (n 2) of the replicating layer are selected, so that a sum of a difference of imaginary parts of the refractive indices n 1and n 2is 0.05-0.7 and a brightness (L*) of the toner layer is 0-90. The film has an optically variable effect produced by the relief structure. The film (1) comprises a transparent replicating layer (2) with a diffractive relief structure (3) and/or a reflective layer, which is formed by a pigmented toner layer (4). The toner layer is directly adjacently arranged to the diffractive relief structure. A refractive index (n 1) of the toner layer and a refractive index (n 2) of the replicating layer are selected, so that a sum of a difference of imaginary parts of the refractive indices n 1and n 2is 0.05-0.7 and a brightness (L*) of the toner layer is 0-90. The film has an optically variable effect produced by the diffractive relief structure. The pigmentation of the toner layer is selected, so that a pigmentation number (PZ) is 1.5-120 cm 3>/g and a transmittance (T) of visible light through the toner layer is 1-50%. For the viewer, the optically variable effect is recognizable under normal illumination with a light source in a first interval of maximum 0.5 m to the film when viewing the film on the side of the replicating layer turned away from the diffractive relief structure. The optically variable effect expresses itself, so that the film has different colors viewed from different viewing angles, different image motives, different alphanumeric characters and/or different dimness. The diffractive relief structure forms a hologram, a holographic representation with kinematic effect, a lens structure, a dim structure and/or a linear- or cross-grid. The sum of the difference of the imaginary parts of the refractive indices proportionally increases with the increased brightness of the toner layer. The sum of the difference of the imaginary parts of the refractive indices is 0.05-0.5 with the brightness of the toner layer of 0-50, which corresponds to a dark color and the sum of the difference of the imaginary parts of the refractive indices is 0.3-0.5 with the brightness of the toner layer of 50-90, which corresponds to a bright color. The film contains a machine-readable coding. Two different toner layers viewed vertical to the plane of the transparent replicating layer are arranged in different areas of the diffractive relief structure, which differ in their imaginary parts of the refractive indices, brightness, pigmentation number and/or transmittance. A further colored lacquer layer is arranged vertical to the plane of the transparent replicating layer viewed in an area of the diffractive structure. An independent claim is included for a method for producing a film. |
