| 摘要 |
<p>PURPOSE:To obtain a print, which is useful for anti-fabrication and anti- falsification, by a method wherein colloid, which is prepared by coveringly separating pulverized magnetic material with surface-active agent, is enmicrocapsulated and mixed with ink vehicle or the like for application. CONSTITUTION:The printed matter concerned is produced by providing two ink layers, one of which is prepared by mixing microcapsules 1 in ink vehicle or binder 4 and the other of which is prepared by printing with ink b having the same color as that of the ink, on matter to be printed 5. The microcapsule 1 is obtained by enmicrocapsulating colloid, which is prepared by dispersing pulverized magnetic material covered with surface-active agent. When a permanent magnet 7 is brought into contact with the rear surface of printed matter produced as mentioned above, the concentration of the microcapsule 1 turns to be transparent, resulting in emerging of the printed matter produced with the ink 6. With the passing of the permanent magnet 7, the concentration of the microcapsule turns to its initial state. Thus, since the reproduction of the magnetic printed matter with copier, is difficult photoengraving process or the like becomes difficult, so the magnetic printed matter is useful for anti- fabrication and anti-falsification.</p> |
