Abstract: A multilayer identification card in which information in the form of patterns, letters, numbers and/or pictures is inscribed by means of a laser recorder in a laser transformable layer of the identification card which is made of plastic and is transparent in the visible spectral range.The material of this laser transformable layer is adapted to the laser recorder in such a way that it absorbs the laser energy strongly enough in the wavelength of the laser beam transformations such as discoloration, microbubble formation, etc., take place locally in the material, rendering the applied information very clearly visible and immune to falsification in the otherwise transparent layer. This layer which bears the information can either be designed as a transparent identification card cover layer or be covered by another plastic layer which is transparent both visually and for the laser recorder.

Abstract: A multilayer identification card bearing information such as letters, numbers, patterns, pictures and so on, in which at least part of the information is present in the form of a structure in relief in a foamable synthetic material. The foamable synthetic material is transparent or dyed in the visible spectral range and is present in the identification card in the form of a layer covering either its entire surface or part of it. The information in relief is produced by means of a laser beam recorder, the energy dosage of which is used to induce the locally controllable foaming process in the synthetic material compounded with chemical or physical blowing agents. The protection against forgery may be further increased by additionally photocuring the foamable synthetic layer.

Abstract: A security with a paper substrate which exhibits identifying marks in the form of color patterns. The color patterns are arranged in the substance of the paper substrate in such a manner that the normal structure of the fibres in the substance of the paper layer is not disturbed by the color patterns. In the manufacture of the security, the color pattern is sprayed on to the not yet completely finished non-woven fibre during the formation of the paper sheet, and is preferably sprayed on to a non-woven fibre which is then united to a second non-woven fibre.