| 摘要 |
<p>The present invention relates to a forgery preventing method using a liquid microcapsule including a color tunable material and an apparatus thereof. The forgery preventing apparatus includes a color revelation unit which includes the color tunable material to change the wavelength of reflected light according to the application of a magnetic field and a magnetic field applying unit which generates the magnetic field. The color and pattern of the color revelation unit are changed or damaged if an external stimulus or an external magnetic field is applied.</p> |
