| 摘要 |
<p>PROBLEM TO BE SOLVED: To increase the performance of preventing the forgery of a printed matter or the like by a simple system of applying a fluorescent light and an infrared lamp without using a testing apparatus by making at least one layer among plural coating films on substrate particles multilayer film coated powder having phosphorescence. SOLUTION: By forming a thin film of multilayers different in refractive indexes, controlling the reflected light interfering waveform of the multilayer film and incorporating pigment emitting a phosphorescent light different in its color in at least one layer of the multilayer film or forming a layer of a phosphorescent material which does not participate in light interference, beautiful and stable ink of blue, green, yellow or the like is made, even without using any dye or pigment and simultaneously, by the descrimination of a printed matter by the fact whether there is phosphorescence or not, the prevention of forgery is made possible. In the case that as a substrate, a magnetic body is used, the multilayer film coated powder can obtain vivid coloring and phosphorescent developing properties, is applicable as the color material of ink for high functionality color magnetic printing and has functions of descriminating the three kinds of visible light, phosphorescent developed color and magnetism.</p> |
