Originally Posted by Manyak
Laser etched keys are...well...the name says it all. They feel a bit scratchy. The process works best on light colored keys because the letter always
comes out black, since that's the color of burnt plastic. So when it's used on black keys, a paint filler is poured into it, as is done with the keyboards like the Das Model S
I worked as an intern this summer in a company that made laser etching machines.
An engineer there explained too me that laser etching didn't always make a "chasm", evaporate the metals or plastics. But could as well, depending on the plastic used (and the settings of the laser etching machine), bubble when heated by the laser and create a clean relief that stands out (like on my 6Gv2).
The color of that relief depended also on the material and settings, but could easily be made so that it would be in strong contrast with the surface. Like very white relief on black plastic.
He used higher intensity lasers to create chasms in metals, I guess it is the same principle for plastics.
So in conclusion the letter doens't always
come out black.