| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium which has good electromagnetic conversion characteristics, is capable of maintaining the good electromagnetic conversion characteristics and traveling durability without a change with lapse of time for a long period of time and has an excellent preservable property. SOLUTION: The total thickness of the medium is specified to <=13.0μm and the average thickness of a magnetic layer is specified to >=1.1μm. Planar inorg. powder and carbon black are incorporated into a back-coating layer. The thickness Db of a nonmagnetic base and the thickness Dr of the back- coating layer satisfy are so set as to satisfy the equation 6<=Db/Dr<=10 and the Young's modulus Eb of the nonmagnetic base and the Young's modulus Er of back-coating layer are so set as to satisfy the equation 0.3<=Eb/Er<=0.8.
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