April 15, 2020
The idea is to vaporize a thin layer of spray paint and etch the destroyed tracks afterwards.
The laser diodes are 3.5 W Blue and a 300mW UV.
Here are some sample tracks:
I also tryed a black dye but the results are nearly the same:
I use EAGLE for the layout and use a script to convert it into a picture for LaserWeb.
The track for the laser: