| abstract |
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 (1) the surface A has a center-line average (CLA) of not more than 0.005 mu m, (2) the surface A has a peak-to-valley (PV) value of not more than 0.06 mu m, (3) the number of protrusions having a height of 0.27 to 0.54 mu m on the surface A is at most 0.2 per mm2, and (4) the surface A is substantially free from protrusions having a height larger than 0.54 mu m. |