| 摘要 |
PURPOSE:To obtain a heat-sensing recording type magnetized security paper, which is able to be preserved for a long period of time in stable condition, by providing a magnetic recording layer on one side of a supporting body, and then, by laminating on the other side a heat-sensing coloration layer and a protective layer composed of a water-soluble high molecular compound and a thermosetting resin filler. CONSTITUTION:A dispersing liquid, which is obtained by dispersing magnetic powder onto resin or water-base binder, is coated and dried to provide a magnetic recording layer on one side of a supporting body, and then, on the other side of the supporing body, colorless leuco dyestuff (such as, crystal violet lactone, etc.) and a coloring auxiliary (such as, citric acid, etc.) are combined with each other by a binding agent and thus obtained mixture liquid is coated and dried to provide a heat-sensing coloration layer. And then, on thus prepared coloration layer, a liquid, in which 20-80wt% of a water-soluble high molecular compond (such as, PVA, etc.) and a thermosetting resin filler (such as, fine particle filler, less then 3-5mu in particle size, which is manufactured from phenol resin, etc.), is coated and dried. |
