Abstract: The present invention relates to a material, preferably a plastic material, comprising foreign substances, characterised in that the material further comprises fluorescent compounds, and a process for sorting a mixture of materials.

Abstract: The present invention relates to a crystalline material comprising a basic crystal based on at least one host element (We), which basic crystal is doped with at least one element of the rare earths (Do), the crystalline material having the formula: We1(a)We2(b)Ta(c)Do1(d)Do2(e)Hal(w)O(x)Te(y)Se(z)

Abstract: The present invention relates to a process for producing a marked layer structure comprising: a) providing a product surface or a substrate with an appropriate surface; providing a support; b) contacting the support with a mixture comprising inert particles, in which particles a marking agent is substantially inseparably enclosed; c) electrochemically or chemically coating the support, the inert particles being incorporated into the layer produced by the coating; and also a layer structure obtained in this way and its use for quality control and/or as a wear indicator and/or as a marker.

Abstract: The present invention relates to a workpiece or a material containing a marking agent which comprises a marker in a molten carrier containing boric acid or borax.

Abstract: The present invention relates to a material, preferably a plastic material, comprising foreign substances, characterised in that the material further comprises fluorescent compounds, and a process for sorting a mixture of materials.

Abstract: The present invention relates to a workpiece which, on its surface, displays a depression having an opening width of at least 0.2 mm and in which depression a carrier material which is connected in a substantially inseparable manner to the workpiece and contains a characteristic marking material for the workpiece is disposed; and to a method for manufacturing the same and to a method for authentication and/or identification of the workpiece.

Abstract: The present invention relates to a method of authenticating and/or identifying an article containing a chemical marking agent, which is substantially inseparably enclosed in a marker as a carrier and contains selected chemical elements and/or compounds in the form of marker elements, in concentrations based on a predetermined encryption code, which method comprises the steps of: i) qualitatively and/or quantitatively identifying the marker elements of the chemical marking agent, and ii) comparing the values identified in step (i) with the predetermined encryption code.

Abstract: The present invention relates to a method of authenticating and/or identifying an article containing a chemical marking agent, which is substantially inseparably enclosed in a marker as a carrier and contains selected chemical elements and/or compounds in the form of marker elements, in concentrations based on a predetermined encryption code, which method comprises the steps of: i) qualitatively and/or quantitatively identifying the marker elements of the chemical marking agent, and ii) comparing the values identified in step (i) with the predetermined encryption code.