Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1997-05-05

1998-11-03

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428323, 428328, 428332, 428340, 428694B, 428394BA, 428694BG, 428694BN, 428694BR, 428900, G11B 05712

Patent

active

058305564

ABSTRACT:
A magnetic recording medium comprising a substrate made of non-magnetic material, and a magnetic layer formed on the substrate, the magnetic layer being composed primarily of a ferromagnetic powder and a binder, wherein an amount of a sulfuric ion extracted when the magnetic recording medium is immersed in a pure water having a temperature of 30.degree. C. for one hour, is 100 .mu.g or less per one square meter of the magnetic recording medium.

REFERENCES:
patent: 3794519 (1974-02-01), Akashi et al.
patent: 4146671 (1979-03-01), Fujiyama et al.
patent: 4604296 (1986-08-01), Aonuma et al.
patent: 4609588 (1986-09-01), Hosaka et al.
patent: 5034271 (1991-07-01), Miyoshi et al.
patent: 5217820 (1993-06-01), Isshiki et al.

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