Patent ID: 7264893

Claim:
A magnetic recording medium comprising a support having provided thereon a nonmagnetic layer containing a nonmagnetic powder and carbon black, and a magnetic layer containing a ferromagnetic metal powder formed on the nonmagnetic layer after coating and drying thereof, wherein the ferromagnetic metal powder has an average major axis length of 25 to 100 nm, the magnetic layer has a thickness of 0.01 to 0.3 μm, the nonmagnetic layer has a thickness of 0.5 to 5 μm, the carbon black is present in the nonmagnetic layer in an amount of from 5 to 100% by weight, based on the amount of nonmagnetic powder, and the magnetic recording medium has a specific surface area of 0.1 to 50 m 2 /g and a total pore volume of 0.001 to 1 ml/g, the specific surface area and the total pore volume being measured by a nitrogen absorption method.