Hey Folks..

I was fooling around experimenting today and I put a piece of glass on the bed covered the surface with perm marker and set it on an aluminum plate.

Default settings (200mms/100% power (20 watts, fiber laser) and 20khz) and burned a cm square block.

When I picked the glass off, a layer of aluminum had fused to the back of the glass. I even tried to scrape of off.. I COULD, but in short, it was there permanently. The glass was pretty rough in the first place, but the alum was nicely coated and pretty specific to the prescribed burn point.

I ASSUME I performed some sort of vapor deposition or something?

But.. what DID I do? (not a trivia question.. I'm honestly curious)