In this video I tell you how to write on a metal piece with a graphite sharp lead (those that are made for ...
In this video I tell you how to write on a metal piece with a graphite sharp lead (those that are made for some pencils that are similar to pens) and a 12 V transformer (AC-DC adaptor). Don't try to do this if you're not sure, and be careful if you do it. It's not difficult and at first it's amazing and fun. The light and heat produced may damage you. So use protection like sunglasses and security gloves.
You can get the 12 V adaptor from an old electrical appliance, or you can buy it at an electronic shop (you may use it for many experiences!)
Enjoy it and please rate high if you think the video deserves it!