AUTHENTICITY JUDGING MEDIUM, BASE MATERIAL CAPABLE OF JUDGING AUTHENTICITY, AUTHENTICITY JUDGING MEDIUM LABEL, AUTHENTICITY JUDGING MEDIUM TRANSFER SHEET, SHEET CAPABLE OF JUDGING AUTHENTICITY, AND INFORMATION RECORDING ELEMENT CAPABLE OF JUDGING AUTHENTICITY

摘要

The invention relates to an authentication medium capable of eliminating problems with the formation of an authentication portion with an embossed hologram, for instance, difficulty with which fabrication time is cut down, and difficulty with which an authentication pattern is changed due to an increased step counts at the time of embossing mold fabrication. A thin-film layer (2) made up of a material that changes in transmittance or reflectance upon heating, an orientation film (4) that is provided if necessary, and a color change layer (3) such as a light selective reflecting layer comprising a cholesteric liquid crystal layer are stacked on a substrate (12). By means of a thermal head or the like, recording is applied to the thin-film layer (2), and changes in the hue of the light selective reflecting layer (3) at a recorded site or the presence or absence of reflection or hues upon observation by way of a circular polarization sheet are observed, thereby solving the above problems.