| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium excellent in electromagnetic conversion characteristics, durability and reliability. SOLUTION: In the production process of a magnetic recording medium by applying a magnetic coating material essentially comprising a Co-coatedγ-Fe2 O3 magnetic powder and a binder on a nonmagnetic support, the magnetic coating material is prepared by mixing a magnetic powder and a binder, filtering, and further stirring. The coating material is prepared in such a manner that the amt. of the binder in the supernatant of the magnetic coating material is 104 to 110 when the amt. of the binder in the supernatant of the magnetic coating material after filtering is 100.
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