| 摘要 |
<p>PURPOSE:To provide a magnetic recording medium having high forgery preventing effect. CONSTITUTION:A magnetic layer 3 is provided on a substrate 2 and a magnetic shield layer 4 is partially provided thereon and a printing layer 5 having the same thickness as the magnetic shield layer 4 is provided to the part not provided with the magnetic shield layer 4 of the magnetic layer 3 and a concealing layer 6 is further provided on the layers 4, 5. The magnetic data of the magnetic layer 3 at the part where the magnetic shield layer 4 is not present is read by a first magnetic head 7 and bias is applied by a second magnetic head 9 to read the magnetic data of the magnetic layer 3 at the certain part of the magnetic shield layer 4 and both magnetic data are compared to judge genuineness to discriminate a magnetic recording medium.</p> |
