creating visible marks on the treated surface. Depending on the materials, the laser-material interactions can be different. On harder surfaces, the mechanism of action is primarily the ablation where the focused beam of laser dislodges microscopic particles from the substrate. Engraving can achieve depth of 100um and beyond, whereas laser marking is typically shallower.

The choice of lasers is important for the quality of the mark. To create a clean mark, short bursts