Laser cleaning of a vintage copper penny. The laser used in this video is a Cloudray QS-50 fiber laser, linked here: [ Ссылка ]
![](https://i.ytimg.com/vi/i5hmIf0Z030/maxresdefault.jpg)
Laser cleaning of a vintage copper penny. The laser used in this video is a Cloudray QS-50 fiber laser, linked here: [ Ссылка ]