| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an antifalsification sheet which has a high effect of preventing forgery and enables easy checking of whether or not hologram threads are inverted and turned over, on the occasion of putting them in base paper. SOLUTION: A pattern-forming layer whereon a hologram pattern is formed and a reflecting layer are laminated on a transparent support film and a hologram material sheet thus constituted is slit in narrow widths into threads 10, which are put in base paper of pulp. In an antifalsification sheet 1 thus prepared, a fluorescent color developer is mixed in an adhesive layer making the threads adhere to the base paper or in the pattern forming layer.</p> |
