IDENTIFICATION CODE, IDENTIFICATION CODE READER, APPLYING/VOTING METHOD USING IDENTIFICATION CODE AND IDENTIFICATION CODE READER, AND ACCEPTING METHOD USING IDENTIFICATION CODE AND IDENTIFICATION CODE READER
摘要
<p>An identification code is printed with an ink the reflectance of which varies when a predetermined strength or more of light with a predetermined wavelength is applied to the ink for a predetermined time or longer, thereby changing the value that is read by an identification code reader. Alternately an identification code is printed on a material the reflectance of which varies when such a light is applied to the material similarly, thereby changing the value read by an identification code reader.</p>
