Color Engraving

Unboxing xTool F1 Laser
ToolsToday

Witchcraft! Is this real? Seems to be. Didn't find much information about it. Wikipedia has a page, but it is very short and is not very helpful. Found this on MonPort:

Color laser engraving technology utilizes high-powered lasers to etch intricate designs and patterns onto metal surfaces. Unlike traditional engraving methods, color laser engraving offers the ability to create vibrant and multi-colored designs with precision and accuracy. This is achieved through the modulation of laser pulses to control the depth and intensity of the engraving, resulting in stunning visual effects on metal substrates.

Found this on Xtool:

In the first method, the surface of the metal is turned into a molten form using a very powerful laser. During the melting process, oxidation also occurs. The surface of the metal oxidizes due to the high temperature and reaction with oxygen. 

The melted material solidifies again, but due to oxidation, a special-colored layer is created on the metal, which looks like colored engraving. Therefore, you see vivid colors on the engraved surface rather than the normal engraving color.