| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve such problems that when a hologram sheet, which includes a metal thin film reflection layer as a constituent material of the sheet, is subjected to an adhesion treatment and stuck to a target object having a conductive surface, the metal thin film reflection layer is electrically corroded, causing partial decrease in the reflectance and significant deterioration in a hologram reproduced image, and that a person conducting an illegal action can peel the stuck hologram sheet without breaking the sheet by giving a particular attention and can use the sheet for another purpose.SOLUTION: A hologram sheet excellent in design property and forgery preventing property is provided, in which a hologram relief surface of a hologram-forming layer constituting the hologram sheet is coated with a high refractive index resin layer. Thereby, a sharp hologram reproduced image can be reproduced. In cases where the hologram sheet is processed into a label and stuck to a target object for forgery prevention, when somebody tries to peel the sheet, the hologram reproduced image deteriorates and cannot be restored.</p> |
