MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To reduce surface electric resistance with a small amount of carbon black by specifying the specific surface area and specific oil absorption of the carbon black in a back layer above specified values. CONSTITUTION:A magnetic recording medium which has a magnetic layer and the back layer on the opposite surfaces of a base is prepared by using carbon black powder which has >700m<2>/g specific surface area and >300ml(OBP)/100g oil absorption as the carbon black in said back layer to obtain a remarkable antistatic effect with a small amount of carbon black, reducing dropouts and improving the wear resistance.