While he was initially planning on using a diode laser, doing anything more than engraving is tricky. He purchased a cheap 40 W CO2 laser tube, but it meant that he needed water cooling ...

He wanted to take it one step further and added a laser in place of the pen ... [Viacheslav] has tested this as a method of applying etch resist to a copper clad board for PCB production.

Honor mom with hand-poured candles with laser engraved lids ... You can see the lid on the right has uneven etching - some of ...