摘要:
Disclosed herein is a method for forming a surface relief microstructure, including the steps of A) applying a curable composition to at least a portion of the frontside of the paper substrate, B) contacting at least a portion of the curable composition with surface relief microstructure, C) curing the composition by using at least one UV lamp which is arranged on the backside of the paper substrate, and D) depositing a metallic layer, and optionally a layer of a transparent high refractive index material, on at least a portion of the cured composition, wherein the UV lamp has an emission peak in a UV-A range of 320 nm to 400 nm and additionally in a near VIS range of 400 nm to 450 nm, the curable composition comprises a photoinitiator which absorbs in the UV-A range and also in the near VIS range.
摘要:
A package that has at least one hologram on its exterior surface is formed from a paper, paperboard or thermoplastic substrate material that has an inner surface and an outer surface. The outer surface has a radiation curable particulate metal containing coating. This coating is cured and zero to one or more ink containing coatings are applied to the radiation curable particulate metal containing coating in areas that are not to have a hologram. Each of these ink containing coatings are cured, and a substantially transparent radiation curable coating is applied to the areas deficient in the zero to one or more ink coatings. This substantially transparent radiation curable coating is contacted with a substantially transparent holographic shim in an area not having thereon ink containing coatings while curing radiation is applied to the substantially transparent radiation curable coating and the substantially transparent shim.
摘要:
There is provided an apparatus and a method of printing a diffraction grating. In particular, the present invention relates to diffraction gratings applied to a substrate, such as a hologram.
摘要:
A microstructure area (201) providing a first diffractive visual effect is produced on the surface layer (240) of a paper or cardboard substrate (230) of a product (200). In addition, a bulge (206) or a recess (207) having a second microstructure area (202) is produced on the surface layer (240), wherein a doubly curved portion (203) is located between the first (201) and the second (202) microstructure areas. Said combination of the bulge (206)/recess (207), microstructure areas (201, 202) and doubly curved portion (203) makes counterfeiting of the product (200) difficult and provides a special visual effect.
摘要:
An optical security feature, e.g. for a banknote or other security documents, comprises a first and a second holographic layer arranged on top of each other. Each layer comprises a comparatively simple reflective volume hologram, such as it can e.g. be recorded by the interference pattern of two Gaussian light beams. The volume holograms have different grating spacing and/or orientation as well as different extension such that the observer can distinguish and verify them easily. The simple nature of the holograms make the security feature easy to manufacture, while its two-layer structure makes it hard to copy and yields high diffraction efficiency.
摘要:
A method for producing an optical element, preferably a security feature, wherein a film having a first embossed hologram in an embossing layer is provided, and a second embossed hologram is embossed into the same embossing layer such that the first embossed hologram is partly replaced with the second embossed hologram. The invention further relates to a method for producing an optical element wherein an embossable film provided with an embossed hologram is partly filled with printing lacquer, and a method for producing an optical element wherein hologram embossing is prevented by prior partial printing of the embossing film with curable printing lacquer. The invention relates further to optical features producible by the inventive methods, documents of value having an inventive optical feature and a numbering embosser for use in an inventive production method.
摘要:
The present invention provides an image formation device including: an image reading section which reads an image from an image formation member, at which image formation member the image is formed and a hologram recording medium is mounted, associated information relating to the image being stored as a hologram in the hologram recording medium; an information acquisition section which acquires the stored associated information from the hologram recording medium; an image processing section which processes the image read by the image reading section in accordance with the associated information acquired by the information acquisition section; and an image formation section which forms an image processed by the image processing section.
摘要:
The invention relates to a method for producing an optical element, preferably a security feature, wherein a film having a first embossed hologram in an embossing layer is provided, and a second embossed hologram is embossed into the same embossing layer such that the first embossed hologram is partly replaced with the second embossed hologram. The invention further relates to a method for producing an optical element wherein an embossable film provided with an embossed hologram is partly filled with printing lacquer, and a method for producing an optical element wherein hologram embossing is prevented by prior partial printing of the embossing film with curable printing lacquer. The invention relates further to optical features producible by the inventive methods, documents of value having an inventive optical feature and a numbering embosser for use in an inventive production method.
摘要:
A multilayered volume hologram structure of the invention comprises a substrate 2 for a certificate or the like, and an adhesive layer 5, a volume hologram layer 5 and a surface protective film 7 laminated on the substrate in the described order. When a multilayer structure consisting of the volume hologram layer 5 and surface protective layer 5 is forcibly released from the substrate for the purpose of making a photograph replacement or falsifying a personal information area, the volume hologram image can break down certainly, thereby ensuring prevention of falsification. A multilayered volume hologram structure-making label is useful for making a multilayered volume hologram structure.
摘要:
A paper support has an adhesive layer and a metallized holographic image, wherein the metallized holographic image includes at least two holograms, such that the first hologram is visible only by non-coherent light and the second hologram is visible only by coherent light. The holographic images are formed on a photosensitive element on a polymeric support by imaging steps, which include metallizing the holographic images and overcoating the holographic images with an adhesive layer. Next, the metallized holographic images are transferred to the paper by laminating the adhesive layer to the paper at a predetermined temperature and pressure, and subsequently delaminating the polymeric support from the paper, such that the holographic image remains on the polymer support for reuse.