Claims
- 1. A magnetic recording tape comprising a nonmagnetic substrate and a magnetic layer which is formed on at least one surface of said substrate, and magnetic layer comprising of a cobalt-coated iron oxide magnetic powder mixture containing at least 6% by weight of Fe.sup.2+, said magnetic powder mixture being 70% to 90% by weight based on the weight of said magnetic layer, said magnetic powder mixture consisting of Fe.sub.3 Op.sub.4 powder particles or intermediate oxide of Fe.sub.3 O.sub.4 powder particles coated with cobalt and .gamma.-Fe.sub.2 O.sub.3 powder particles coated with cobalt, a binder and 1 to 3% by weight of carbon black based on the weight of the magnetic powder, said magnetic layer having a surface resistivity of not larger than 1.times.10.sup.9 .OMEGA./sq. cm and a thickness of not larger than 3.5 .mu.m, said magnetic recording tape having a light transmittance of not larger than 0.8% and a residual magnetic flux density of at least 1400 G.
- 2. The magnetic recording tape according to claim 1, wherein the content of said Fe.sub.3 O.sub.4 or intermediate oxide of Fe.sub.3 O.sub.4 powder particles coated with cobalt in said mixture is at least 20% by weight of said mixture.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-240445 |
Sep 1989 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/580,649 filed on Sep. 11, 1990, now abandoned.
US Referenced Citations (5)
Continuations (1)
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Number |
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Parent |
580649 |
Sep 1990 |
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