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US 4,395,466 AGranted
Magnetic recording medium
AssigneeFuji Photo Film Co., Ltd.
InventorsHiroshi Ogawa, Yasuo Tamai
Life of this patent
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Abstract
A magnetic recording medium comprising a non-magnetic base which has formed thereon a magnetic layer made of a binder and fine ferromagnetic particles dispersed therein is disclosed. The magnetic layer is characterized by containing a mineral oil having a viscosity of 300 cs or less at 37.8.degree. C. and an aliphatic acid having 12 to 22 carbon atoms.
Claims3
A magnetic recording medium, comprising:
- a non-magnetic base;
- a magnetic layer formed on said base;
- said magnetic layer consisting essentially of a binder and fine ferromagnetic particles dispersed within said binder, a mineral oil having a viscosity of 300 cs or less at 37.8.degree. C. contained in said magnetic layer an an amount of 0.05 weight percent to 1 weight percent, and an aliphatic acid having 12 to 22 carbon atoms contained in said magnetic layer in an amount of about 0.2 weight percent to 5.0 weight percent, based on the weight of the fine ferromagnetic powder.
Dependencies are inferred from the claim text.