ntroller (9), the conductive beads (10), the wax (11) and other additives such as a leveling agent, a pigment, a dye, a plasticizer and a defoaming agent, and the process shall not specifically be restricted. [0459] They can be mixed by means of a known machine such as a double arm stirrer, a roll mixer and a twin screw extruder, and the composition is subjected to vacuum degassing treatment, fina