| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide printing ink which has a high peelability and an excellent aptitude, can easily form a peeling layer on a necessary spot of a substrate, and enables the position of the peeling layer to be recognized even on-line; and a sheet using the same. SOLUTION: A fluorescent substance is compounded into known ink for forming the peeling layer to give a fluorescent substance-containing ink for forming the peeling layer. The layer is formed on a specified spot of at least one side of the substrate by using the fluorescent substance-containing ink for forming the peeling layer, thus giving the sheet. Though the peeling layer is hardly visible because of its transparency, its position can be recognized even on-line because it emits light when irradiated with ultraviolet rays by using an ultraviolet lamp (black light) in order to recognize the position.</p> |
