Laser engraving works by vaporizing some of the base material with cone shape indentation. (Engraving depth capabilities depend on your specific laser.) During the process of laser etching, the cover layer of your material is vaporized, producing little to no depth but usually high contrast marking. The process is like cutting, except only the top layer is vaporized. Laser etching works well on materials with two or more layers, coated metals, anodized aluminum and stone. We can add contrast by fusing adding a layer with ceramic powders onto the surface. This process is accomplished using special polimers.