Method of manufacturing a reference member for calibrating toner concentration monitors in electrophotographic document production apparatus

摘要

A toner concentration reference member which shows substantially no temperature effects is manufactured by a process employing the milling of ferrite particles together with the epoxy beads for several hours without using any solvent. After milling, the dry mixture is pressed in a powder press into pallet form. The still fragile, pressed reference members are removed from the press and baked at elevated temperatures to induce the epoxy to thermally set. With baking, the reference members become mechanically stable and durable and, thus, easy to handle.