| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent forgery and reprinting of a credit card, a cash card, a telephone card, a card key, a passport, securities or the like. SOLUTION: A recognition information part of a data carrier is formed by simultaneous extrusion forming monocolor thermoplastic resin pellets to be a foundation body, thermoplastic resin pellets having different color from the foundation body, and magnetized powder with large coercive force. Namely. the data recognition part 2 of a data carrier 1 is expressed such that, e.g. light permeation orange color thermoplastic resin is made into patterns 4 such as a speckle of marble relative to a foundation body 3 consisting of transparent thermoplastic resin, and has magnetized powder 6 blended therein. Thus, the recognition information can be checked twice with the consequence that forgery and reprinting are rendered impossible.</p> |
