摘要:
A security device has a support substrate of a first material having a softening temperature t1 and an embossed layer of a second different material supported by the support substrate having a softening temperature t2, wherein t2
摘要:
The invention provides a plurality of substantially same planar pigment flakes, each formed of one or more thin film layers. Each flake has a face surface and a flake border delimiting the face surface; the flake border undulates in the plane of the flake. The flakes have a pre-selected shape, may have a symbol or a grating thereon. A method of manufacturing of these flakes including the steps of: (a) providing a substrate having a plurality of one-flake regions and a plurality of depressions or protrusions disposed therebetween and not extending into the one-flake regions, (b) coating the substrate with a releasable coating, and (c) removing the releasable coating and breaking it into the flakes; wherein two adjacent of the one-flake regions are separated by at least three of the depressions or protrusions for facilitating the breaking of the releasable coating into the flakes.
摘要:
A method of forming pigment flakes includes using a deposition substrate having a plurality of regions; some of the regions are raised or lowered so that there is a level difference between each two adjacent regions. A coating deposited onto this substrate breaks along region borders when it is separated from the substrate. In one embodiment, the substrate includes first and second regions, wherein each of the first regions is in an abutting relationship with at least one of the second regions. All the first regions are at a first level and all the second regions are at a second level, and the difference between the first and second levels is greater than a predetermined value. The first and second regions are preferably square-shaped regions for manufacturing square flakes with practically no debris.
摘要:
A plurality of flakes are provided that can be used in ink or paint wherein the flakes are of a size that requires magnification to see their shape, in the form of polygons, such as squares, triangle or rectangles. A breaking or grinding process is used to break a foil into these shaped flakes and frames or walls are provided within the foil sheet so as to delineate the shapes and these lines provided by frames or walls will facilitate breakage in a preferred manner such that the flakes break into selected shaped polygons. Remnants are typically present along flake edges due to the grinding and breakage process however with magnification, one can see the resultant regular polygonal shape. To clearly see the remnants one requires increased magnification and the remnant itself provides a type of signature. It can be seen as a taggent within a taggent.
摘要:
A plurality of flakes are provided that can be used in ink or paint wherein the flakes are of a size that requires magnification to see their shape. The flakes are in the form of regular polygons, such as squares, triangle or rectangles. A breaking or grinding process is used to break a foil into these shaped flakes and frames or walls are provided within the foil sheet so as to delineate the shapes and these lines provided by frames or walls will facilitate breakage in a preferred manner such that the flakes break into selected shaped polygons. Due to the breakage or grinding process, small remnants are typically still present on the shaped flakes as a result of the way in which the foil and flakes are broken, however with magnification, one can see the resultant regular polygonal shape. To clearly see the remnants one requires increased magnification and the remnant itself provides a type of signature. It can be seen as a taggent within a taggent.
摘要:
A kit for producing optically variable images is disclosed wherein the kit includes a special effect pigment having particles that are magnetically alignable, a magnet for aligning the particles and a scribing tool for personalizing an image. Alternatively or in addition the kit can include e-field responsive flakes in a carrier vehicle and an electric field source for aligning said flakes. A stylus may be included for moving or changing the alignment of a portion of the flakes that have been aligned in the magnetic or electric field.
摘要:
A kit for producing optically variable images is disclosed wherein the kit includes a special effect pigment having particles that are magnetically alignable, a magnet for aligning the particles and a scribing tool for personalizing an image. Alternatively or in addition the kit can include e-field responsive flakes in a carrier vehicle and an electric field source for aligning said flakes. A stylus may be included for moving or changing the alignment of a portion of the flakes that have been aligned in the magnetic or electric field.
摘要:
The invention relates to a method of manufacturing a color-shifting optical device with a dielectric spacer layer such that different regions thereof have different thicknesses. The method includes: (a) coating a substrate with one of a reflector or absorber layer, (b) providing a spacer layer onto the layer coated in step (a), the spacer layer comprising a spacer material and a soluble pocket within the spacer layer, (c) modifying the spacer layer by dissolving the soluble pocket so as to remove a portion of the spacer material to vary the thickness of the spacer layer, and (d) coating the spacer layer with another of the reflector or absorber layers.
摘要:
Opaque color shifting strands are disclosed that have an optically variable color with a change in angle of incident light. The strands have an organic substrate and an optical interference structure on one or both sides of the organic substrate. The optical interference design can be a Fabry-Perot structure or can be optically variable ink. Plural strands can be combined to form a textile for example such as a garment label.
摘要:
Diffractive pigment flakes are selectively aligned to form an image. In one embodiment, flakes having a magnetic layer are shaped to facilitate alignment in a magnetic field. In another embodiment, the flakes include a magnetically discontinuous layer. In a particular embodiment, deposition of nickel on a diffraction grating pattern produces magnetic needles along the grating pattern that allow magnetic alignment of the resulting diffractive pigment flakes. Color scans of test samples of magnetically aligned flakes show high differentiation between illumination parallel and perpendicular to the direction of alignment of the magnetic diffractive pigment flakes. In another embodiment diffractive pigment flakes are selectively aligned by electrical fields. In other embodiments, special diffractive optical variable images are described and the method to produce them.