Patterns duplicated from a matrix to a magnetic media by simple contact under a magnetic field.
What is it about?
A matrix covered by an iron films in which pattern were engraved, is put in contact under a magnetic film. The patterns are duplicated under a magnetic field due to the leakage fields in the the regions were iron was removed in the matrix.
Why is it important?
A very simple method to duplicate collectively a lot of information on a magnetic film.
The following have contributed to this page: Philippe Tailhades