I just entered the world of engraving slate and am having issues with getting a “perfect” image engraved (see pictures). Has anyone else also ran into horizontal lines showing up across their engraving and know how to solve it?
@GrooveStranger may be right, though it looks like it may be variation in the material to me. If I were testing I’d up the power significantly, at least double. If it still happens then you’d know for sure.
You might like this:
The oil trick is really nice with slate.
Also, you can sand slate smooth and reuse it in a pinch. Might be useful if you are running low on test material.