An engraving effect can in principle be achieved on metals of all kinds by means of a Nd:YAG laser. The depth of engraving depends merely on the power of the laser system and on the speed with which the laser beam is moved over the part.

When marking precious metal, very dark to black local structural changes, so-called temper colors, can be achieved, by modifying the temperature action of the laser beam. The advantage of this marking process is on the one hand the means to create strongly contrasting marking, and on the other, the fact that although this marking process has a deep action in the material, no, or only extremely minimal debris occurs on the edges of the marking.

Even anodized aluminum parts can be marked appealingly and with rich contrast.
The anodized layer is either worn down by the Nd:YAG laser, or is bleached with other laser parameters. The results speak for themselves!