Method for preparing document capable of being magnetically readout

PROBLEM TO BE SOLVED: To easily and profitably prepare a document capable of being magnetically readout and to easily and rapidly alter information on the document. SOLUTION: A necessary document is prepd., letters are printed in the document by an electrostatic image forming method using a high-speed electronic printer and they are developed with a magnetic toner compsn, contg. about 20-70wt.% magnetite and about 30-80wt.% particles of a toner resin selected from among a styrene-methacrylate copolymer, a styrene-butadiene copolymer, a styrene-acrylate copolymer are polyester and carrier particles each made of a ferrite core coated with a polymer compsn. to prepare the objective document capable of being magnetically readout. COPYRIGHT: (C)1997,JPO