| 摘要 |
PURPOSE: A forgery prevention sheet is provided, which can be used as a tag label on big-name brands' care labels on clothing, on which a specific logotype or character representing its big-name brand is printed with a unique visual pattern that can hardly be copied and forged. CONSTITUTION: The forgery prevention sheet comprises at least triple-layered construction including a base and outer layers and formed on both side of the base. The outer layers have opacity of 20-92%, preferably of 40-92%. The inner surface of at least one of the outer layers is printed with a fluorescent pigment ink into a predetermined design pattern. The printed pattern is not visible under the sunlight, but becomes visibly luminous to human's naked eye, when the sheet is irradiated with ultraviolet rays from the top and from the bottom. The sheet has no fluorescent ink on or near the top surface and, therefore, provides good printability when subjected to post-printing process with any printing system including a lithographic offset printing press, a laser printer and a thermal transfer printer. |
