Laser Color Marking

Overview

Laser Color Marking - Color Range Sample
© Photo Fraunhofer USA CLA

Laser Color Marking - Color Range Sample

Lasers can be used to create permanent color marking on a metal surface. Laser color marking is based on surface oxidation and thin film effects and does not use any chemicals, coatings or tools. Different colors ranging from silver and gold to blue and green can be created. To create uniform and high quality marks, the laser must have a good beam quality, stability and should allow independent pulse parameter adjustment. Only changes in laser process parameters are required for changing colors. Color marking with lasers makes the surface visually more attractive and is gaining interest for consumer products.

Process Advantages

  • No coatings or chemicals
  • No tools or dies
  • High contrast, high accuracy and high quality coloring
  • Flexible marking process  using digital image
  • Different colors by changing the laser parameters

Laser Applications

  • Color marking of metals
  • Product marking and decoration
  • High contrast marking

Industries

  • Consumer products
  • Medical devices
  • Electronic goods

Materials

  • Stainless steel
  • Titanium

  • Laakso P., Pantsar, H. and Mehtälä V., “Marking decorative features to stainless steel with fiber laser” IMD/ALAC 2008