Abstract: A magnetic recording medium which comprises plurality of magnetic layers comprising at least first and second magnetic layers which are successively formed on a surface of a polyethylene terephthalate support, wherein said support contains inert inorganic particles having an average particle size of from 0.5 to 0.7 microns, a standard deviation of 0.1 microns or less and the surface of said support has a center line average roughness (Ra) of 16 nm or less and a density of protrusions (Ds) of 6000/mm.sup.2 or more in the case of protrusions of 0.7 microns of more.

Abstract: A method of producing a magnetic recording medium comprises the steps of kneading and dispersing ferromagnetic powder, binder and non-ferromagnetic powder to obtain magnetic coating solutions, and applying a plurality of the magnetic coating solutions on a non-ferromagnetic substrate to form a plurality of magnetic layers on the substrate. In the kneading and dispersing step, a magnetic coating composition containing a ferromagnetic powder and a solvent of 15 to 30 wt % of the ferromagnetic powder is kneaded by a two-shaft continuous kneading and mixing machine and then dispersed by a pin type sand grinder to obtain a first magnetic solution. Another magnetic coating composition containing a ferromagnetic powder and a solvent of 30 to 50 wt % of the ferromagnetic powder is kneaded by a double-arm open kneader and then dispersed by a pin type sand grinder, and finally dispersed by a disk type sand grinder to obtain a second magnetic coating solution.