Magnetisches Aufzeichnungsmedium

摘要

A magnetic recording medium comprises: a non-magnetic substrate; a non-magnetic undercoat layer on said non-magnetic substrate, said undercoat layer comprising a binder resin and non-magnetic acicular hematite particles containing 0.05 to 50 % by weight of aluminum uniformly within the particles, calculated as Al, based on the total weight of the non-magnetic particles and the binder resin,; and a magnetic recording layer on said non-magnetic undercoat layer, said magnetic recording layer comprising magnetic particles containing iron as a main ingredient and a binder resin. The magnetic recording medium has a small light transmittance, a smooth surface, a high strength and a high durability.