Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-07-11

1986-12-16

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

360134, 360135, 360136, 427 44, 427128, 427131, 428148, 428323, 428328, 428329, 428408, 428694, 428900, G11B 570

Patent

active

046296468

ABSTRACT:
A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on one side of the substrate and a back coating layer formed on the other side of the substrate, characterized in that the back coating layer contains carbon black having an ash content of at most 0.05%, a specific surface area of from 20 to 350 m.sup.2 /g, an oil absorption of at most 200 ml/100 g and an average particle size of from 13 to 60 m.mu.m.

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patent: 4448842 (1984-05-01), Yamaguchi
patent: 4455345 (1984-06-01), Miyatuka

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