Can the K40 Laser Engrave Metal?

Is the Chinese K40 Laser engraving machine and its 40 watt CO2 Laser tube powerfull enough to penetrate metal surfaces?

I will put it to the test and try to engrave on 5 differend sorts or metal: Brass, Copper, Aluminium, Aluminium foil and Carbon steel.

Then i tried if i can etch the metal surfaces by first engrave a design onto the metals that are masked off with masking tape then using simple electrolysis to engrave it permanently.

Also i listed up differend methods how you actually can get an engravement or permanent print onto a metal surface using this laser.

Can the K40 Laser Engrave Metal REVISITED:
https://youtu.be/aT65ODsnLKA

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https://www.youtube.com/watch?v=kirJ3RYVM9U&list=PLp2y2gY-3ZajIFsm5nG4mXbztiGNKoLbC

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Видео Can the K40 Laser Engrave Metal? канала Mancave Effects