Patent ID: 6827968
Filing Date: 2004-12-07
Classification: G11B,Y10S

Abstract:
A process for producing a magnetic recording medium comprising a non-magnetic flexible support, a non-magnetic layer comprising a non-magnetic powder and a binder, and a magnetic layer comprising a ferromagnetic powder and a binder, the non-magnetic layer being provided on top of the support, the magnetic layer being provided on top of the non-magnetic layer, and the non-magnetic powder comprising two or more types of non-magnetic powder including carbon black and a non-magnetic powder other than carbon black, the process comprising:a step of separately dispersing a non-magnetic liquid A and a non-magnetic liquid B, the non-magnetic liquid A comprising a binder and a non-magnetic powder other than carbon black and the non-magnetic liquid B comprising carbon black and a binder; a step of stirring and mixing the non-magnetic liquid A and the non-magnetic liquid B to prepare a non-magnetic coating solution; providing said non-magnetic coating solution on top of said non-magnetic flexible support to obtain said non-magnetic layer; and providing said magnetic layer on top of said non-magnetic layer.