1. Context

The first trace of the concept of using magnetism for printing purposes can be found in the 19th century, with the publication of the article "Printing by Magnetism" by W. Jones in 1839. . Without proposing a complete printer design, W. Jones considered various processes that would make it possible to print a single page in a very large number of copies without having to modify anything. He proposed, for example, the use of a blackened iron plate as a recording medium for the latent image, or an iron needle aligned in the direction of the earth's magnetic field.