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Laser Marking of Metals

Three Different Marking Methods

Depending on the requirement profile, three different laser marking methods are available.

Annealing
Laserbeschriften

Annealing

Laser annealing is used with all metals which show a color change when exposed to heat and oxygen. The laser marker selectively heats up small spots of the workpiece surface until annealing colors appear. Annealing leaves the material surface unharmed but still produces high-contrast, clearly legible markings.

 

Laser Engraving
Laserbeschriften

Laser Engraving

Usually the laser marker engraves the material surface down to some 10 µm in depth. Engraved marks are exceptionally durable and can only be removed by heavy grinding. Therefore laser engraving is used for forgery-proof product marking.

 

Surface Removal
Laserbeschriften

Surface Removal

Selective ablation of lacquer coats or anodizing layers shows a different-colored material underneath and produces colored markings.

 

Features at a Glance

  • Durable, high-contrast markings
  • Intact surfaces (annealing), important e.g. for medical devices
  • Fast compared to mechanical marking techniques
  • Very small line widths realizable
  • Flexible, individualized marking content
Product recommendation

Product recommendation

For this applications we recommend the laser markers: PowerLine E Air Serie, PowerLine E Serie, PowerLine F 20/F 30.