DIY 3D printing in metal is a lot more complicated ... The first half of the video is dedicated to the work on a laser welding system that doesn’t pan out in the end at all.

[Brain] wanted to mark some scissors with his Ortur laser engraver. The problem? The laser won’t cut into the hard metal of the scissors. His solution? Smear the scissors with mustard.

Monitoring 3D printing of 17-4 PH stainless steel was made possible by the bright X-ray beams at the Advanced Photon Source ...