Abstract: A magnetic imaging system is disclosed wherein an optical image is first reduced to a graphic image by employing a magnetizable marking material followed by magnetization of the graphic image and transfer of the imagewise pattern of magnetization to a magnetic substrate to provide a latent magnetic image. The latent magnetic image is utilized for the purpose of image duplicating by successive development and transfer steps or for electronic transmission of information. Improved latent magnetic images are provided by retoning the graphic image after magnetization and further magnetizing the retoned graphic image from which the latent image is produced. Also, polishing the redeveloped graphic image further improves the quality of the latent image.