A simple magneto-optical method for the restoration of erased markings in metals

There are different techniques for the restoration of erased markings in metals. Non-destructive methods are generally preferable. The only frequently used non-destructive method is the magnetic technique. The different kinds of magnetic restoration methods are discussed in the article. In the experiments described, the applicability of magneto-optical methods for the restoration of obliterated markings was examined. The results show that the methods are suitable and the required equipment does not cause high expenses.