| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve security by printing on a base material with the use of ink containing a specific substance capable of peculiarly absorbing a bilayer membrane of a bilayer membrane-coated crystal oscillator. SOLUTION: A various kinds of printing is performed on the base material of versatile printed matter 1 in use of ink containing a specific substance capable of peculiarly absorbing a bilayer membrane of a bilayer membrane-coated crystal oscillator sensor. Herein, such a specific substance is, e.g. methylphenyl acetate, isocyamyl acetate, citral, octanol, etc. In addition, by applying voltage by putting electrodes 3a, 3b of the bilayer membrane-coated crystal oscillator sensor so as to generate oscillation that allows a specific substance, e.g. methylphenyl acetate contained in ink 2 vaporizes to be peculiarly adsorbed in the bilayer membrane, a determination of truth or falsehood of the printed matter 1 is made through a phenomenon in which an oscillation frequency is reduced to change because the electrode weight of an oscillator adds to temporarily.</p> |
