| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a falsification prevention medium which is visually recognizably formed at a part of an information recording object being an object for authenticity judgment for clearly discriminating an authentic article and imitation by visual inspection or using a simple device based on the facts that falsification is extremely difficult in a commercial color copying machine, etc., attainment is difficult by the conventional cholesteric liquid crystal medium and color shift does not occur even when a visual inspection angle is changed. <P>SOLUTION: The falsification prevention medium is visually recognizably formed at a part of an information recording object which is the object for authenticity judgment and is arranged by forming a liquid crystal pattern layer constituted of spherical cholesteric liquid crystal particles on a base. <P>COPYRIGHT: (C)2007,JPO&INPIT |
