摘要:
The invention relates to a coin with a disc-shaped coin body (1), which has a rim (4). To provide the coin with an additional security feature that is protected as far as possible from stresses and/or environmental influences, the rim (4) of the coin body (1) is provided with at least one recess (5), in which there is at least one luminescent substance (6). The invention also relates to a method for testing such a coin and a method for producing such a coin.
摘要:
The invention relates to a security feature having a luminescent component and a component camouflaging the luminescent component. The invention is based on a security feature having a luminescent component that has at least one luminophore, consisting of at least one doped host lattice, and a component camouflaging the luminescence component, wherein the camouflaging component has chemical elements that have structural chemical properties similar to the chemical elements of the luminescent component, wherein the chemical elements of the camouflaging component and the chemical elements of the luminescent compartment are formed by different chemical elements.
摘要:
The invention relates to a security feature having a luminescent component and a component camouflaging the luminescent component. The invention is based on a security feature having a luminescent component that has at least one luminophore, consisting of a doped host lattice, and a component camouflaging the luminescence component, wherein the camouflaging component has at least two substances, wherein the first substance of the camouflaging component has an X-ray diffractogram that conceals the X-ray diffractogram of the luminescent component and the second substance of the camouflaging component has at least one cationic element of the luminescent component and at least one cationic element of the first substance of the camouflaging component, wherein the luminescent component and the first substance of the camouflaging component are formed from different cationic elements.
摘要:
The invention relates to a method for producing solid particles having a silica coating, comprising the following steps: dispersing the solid particles to be coated in an aqueous medium to produce a solid particle dispersion, adjusting the pH of the solid particle dispersion by means of a buffer system to produce a buffered solid particle dispersion, and adding an alkaline silicate solution to the buffered solid particle dispersion to form the silica coating on the solid particles during a coating period, wherein the amounts of buffer system and alkaline silicate solution are selected such that the pH of the buffered solid particle dispersion before the addition of the alkaline silicate solution is at least 7.0 and after completion of the addition of the alkaline silicate solution is at most 11.0. The solid particles are preferably inorganic solids, especially acid-labile solids. The method is especially preferably used for silica coating of acid-labile feature substances for security features, security papers and value documents.
摘要:
The invention relates to a device and a method for verifying documents of value that are marked with feature substances, and to the corresponding feature substances. The feature substances are detected and reliably identified at a spatial resolution in the low millimeter range or lower even at high conveying velocities on the basis of Raman or SERS spectroscopy techniques.
摘要:
The invention relates to a value document substrate for producing value documents, in particular bank notes, comprising at least a carrier layer and a first cover layer, wherein the first cover layer is a film layer and the carrier layer is a paper layer or a film layer and the carrier layer is connected to the first cover layer by means of at least one adhesive layer and the adhesive of the at least one adhesive layer contains a chemically unstable inorganic characteristic substance and stabilizes said characteristic substance against harmful environmental influences, in particular with respect to moisture and/or oxygen and/or solvent and/or acids and/or bases and/or oxidant and/or reductant, by means of the three-dimensional cross-linking of the adhesive.
摘要:
The invention relates to a method for checking a value document, especially the authenticity and/or the nominal value of a value document having characteristic luminescent substances, the method comprising the steps of: a1) carrying out a location-specific measurement of first luminescence intensities (L1) at a first emission wavelength in different locations of the value document having the location coordinates (O), to thereby obtain pairs of measured values (O/L1); b1) statistically analyzing the first luminescence intensities (L1) measured on the basis of the individual location coordinates (O), by determining at least one statistical parameter by way of a statistical method; and c1) comparing the statistical parameter determined in step b1) to one or more threshold values.
摘要:
The invention relates to a security feature, comprising a luminescent component and a component masking the luminescent component. The invention is based on a security feature having a luminescent component that comprises at least one luminophore composed of a doped host lattice and a component masking the luminescent component. In order to mask the luminescent component, relevant features required for an identification of the luminescent component are masked by the masking component in that the relevant features of the luminescent component, i.e. the structure of the host lattice of the luminescent component, the stoichiometry of the host lattice of the luminescent component, the elemental composition of the host lattice of the luminescent component, the dopant or dopants of the luminescent components, and the luminescence properties of the luminescent component, are masked by way of the masking component in at least two, particularly preferably in at least three, most preferably in at least four of the relevant features in that the masking component is provided with relevant features that correspond with the respective relevant features of the luminescent component. Thus, an identification of the luminescent component is made more difficult or is prevented.
摘要:
The invention relates to a security feature for securing value documents, comprising particles that are composed of at least two different, spatially separated solid homogeneous phases, each of which can be detected and identified in a spatially resolved manner by means of a spatially resolving analytical process which is suitable for resolving all the way to the single particle level.