| abstract |
A method of manufacturing a magnetic recording medium that is excellent in electromagnetic conversion characteristics and suppresses the occurrence of thermal asperity and is suitable for high-density recording. In a method of manufacturing a magnetic recording medium in which at least one magnetic layer is provided by applying a magnetic paint obtained by dispersing at least a binder and a ferromagnetic hexagonal ferrite powder, the binder is (i) -SO. 3 M, −OSO 3 M, −PO (OM) 2 , A binder containing 0.2 to 0.7 meq / g of at least one polar group selected from -OPO (OM) 2 and -COOM (wherein M represents a hydrogen atom, an alkali metal or ammonium); CONR 1 R 2 , −NR 1 R 2 , and −N + R 1 R 2 R 3 (R 1 , R 2 and R 3 each independently represents a hydrogen atom or an alkyl group) and at least one polar group selected from 0.5 to 5 me The ferromagnetic hexagonal ferrite powder that is at least one of the binders containing q / g and that is subjected to the dispersion has an average plate diameter of 10 to 40 nm and a moisture content of 0.3 to 3% by mass A method of manufacturing a magnetic recording medium, wherein |