It turns out that this is the manufacturing process Letters and Numbers on the Keyboard, Engraved Using a Laser

  Computers or laptops are objects that are inseparable from our current activities. Computers are often used for work or while at school.

Computers are also supported by objects such as mice to keyboards. So, have you ever asked what the process of making numbers and letters on the surface of the keyboard looks like?

The trick is to use a laser, as you can see in this video. However, this laser does not add color to the surface of the keyboard.

The original color of the keyboard is transparent, then painted white and overwritten again black.

The laser beam that hits the keyboard then removes the black color and only leaves white in the form of numbers and letters.

Video: Twitter/cooltechtipz