MAGNETIC CARD SHEET

摘要

PURPOSE:To provide a magnetic card sheet wherein sensitivity of a thermal recording layer is hardly decreased even under high temperature and much humidity and both of a blocking property and a magnetic characteristic are excellent. CONSTITUTION:Amount of nitrogen of a compound to be eluted from a unit area of a magnetic recording layer of a magnetic card sheet wherein the magnetic recording layer is provided to one side surface of a base material into 100ml water at 40 deg.C for 10min is at most 80ppm/m<2>, and the amount of nitrogen should preferably be at most 50ppm/m<2>. An effect for prevention of sensitivity decreasing is large especially in the case of the magnetic card sheet wherein a thermal recording layer is provided to the other side surface of the base material. Thereby, a sensitivity decreasing property of the thermal recording layer by the magnetic recording layer under high temperature and much humidity is improved.