3) microscopic analysys of metals: this analysys reveals what naked eye and magnifier can�t; it is really important to see how the time worked on these rings and the signs like microcracks present;
A couple of examples of a crack due to the time.
5.jpg (60.42 KB, 153 downloads) 6.jpg (61.84 KB, 153 downloads)
Last edited by Antonio Scapini; 05/29/2017 03:26 PM.