| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable sure discrimination from other magnetic recording media and prevent fraudulent act such as forgery, alteration and the like by setting a master magnetic layer including two or more kinds of magnetic materials of different coercive forces and a slave magnetic layer including a magnetic material in a rough-dense pattern of various densities. SOLUTION: A base 12 constituting a magnetic recording medium 11 can be formed of a composite of a single or combination appropriately selected from PET, PET-G, PEN or the like polyester, vinyl chloride or the like resin, a biodegradable resin, copper, aluminum or the like metal, paper, an impregnated paper, etc. A master magnetic layer 14 constituting a magnetic recording layer 13 includes two or more kinds of magnetic materials of different coercive forces. A combination of a low coercive force magnetic material and a high coercive force magnetic material which have a ratio of coercive forces of two or larger can be used as the coercive material. A slave magnetic layer 15 constituting the magnetic recording layer 13 of the magnetic recording medium includes a magnetic material in a rough-dense pattern of various densities.</p> |
