Magnetic recording medium.

摘要

A magnetic recording medium composed of an oriented polyethylene terephthalate film as a support layer and a thin magnetic metallic layer formed on one surface (A) of the support layer and optionally a lubricant layer formed on the other surface (B) of the support layer; characterized in that
<UnorderedLists id="ula01" listStyle="none"><ListItem>(1) the surface A has a center-line average (CLA) of not more than 0.005 µm,</ListItem><ListItem>(2) the surface A has a peak-to-valley (PV) value of not more than 0.06 µm,</ListItem><ListItem>(3) the number of protrusions having a height of 0.27 to 0.54 µm on the surface A is at most 0.2 per mm<Sup>2</Sup>, and</ListItem><ListItem>(4) the surface A is substantially free from protrusions having a height larger than 0.54 µm.</ListItem></UnorderedLists>