| 摘要 |
A magnetic recording medium wherein a magnetic metal film has been formed on one surface of a non-magnetic substrate, and a back coat resulting from a non-magnetic pigment dispersed among a binder has been formed on the other, or reverse to the side upon which the magnetic film has been formed, characterized by that each of the chloride and sulfate ion contents of the back coat, according to the analysis by ion chromatography of its pure water extract, is not more than 5 ppm, and that the binder acting as a constituent of the back coat contains at least polycarbonate urethane.
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