Glass Laser Engraving Tips: UV vs Fiber Laser + Tricks for Best Results
April 15, 2026Wood Laser Engraving Settings: Power, Speed, and Frequency
April 21, 2026Engraving Metals: How to Achieve Color Marks
Achieving vibrant color marks on metals is now possible with modern fiber lasers. Whether you are customizing tools, jewelry, or industrial components, knowing the right techniques can help you create long-lasting, eye-catching colors without using inks or coatings.
1. Why Fiber Laser Color Marking Works on Metals
Fiber lasers, particularly MOPA lasers, allow precise control over pulse width and frequency. This controlled laser energy interacts with the metal surface, forming thin interference layers that produce durable colors.
- Stainless Steel: Can achieve gold, blue, purple, or rainbow effects.
- Titanium: Responds well to pulse width adjustments, producing vibrant blues, purples, and greens.
💡 Learn more about the differences in technology: MOPA vs Standard Fiber.
2. Choosing the Right Laser
- Standard Fiber Laser: Excellent for black marking and deep engraving, but limited in true color marking.
- MOPA Fiber Laser: Offers adjustable pulse width, enabling a wide range of colors on stainless steel, titanium, and anodized aluminum.
For software recommendations and workflow tips, see our Software Comparison guide.
3. Preparing Your Metal Surface
- Clean the surface to remove oils, dust, or fingerprints.
- Ensure the coating or surface is smooth and uniform for consistent color results.
- Always test on scrap material first to determine optimal settings.
4. Recommended Laser Settings for Color Marking
While the exact settings depend on the metal and desired color, here are general starting points for a MOPA fiber laser:
| Material | Power | Speed | Frequency | Notes |
|---|---|---|---|---|
| Stainless Steel | Low-Mid | Medium | 20–50 kHz | Adjust pulse width for desired hue |
| Titanium | Low-Mid | Medium | 20–50 kHz | Multiple light passes may enhance color |
| Anodized Aluminum | Low | Medium-High | 30–50 kHz | Use single pass for subtle color |
Tip: Small adjustments in pulse width can drastically change the color. Keep a record of successful settings for repeatable results.
MOPA Color Chart Download Page.
5. Best Practices for Vibrant Colors
- Use MOPA Pulse Control: Fine-tune pulse width to achieve precise color tones.
- Avoid Excessive Power: Too much energy can remove the coating or create uneven colors.
- Keep the Beam Perpendicular: Consistent angle ensures uniform interference patterns.
- Document Your Settings: Metals and batches can vary slightly; keeping a log helps reproduce results consistently.
6. Post-Marking Care
- Avoid abrasive cleaning immediately after marking.
- For industrial components, check adhesion and durability of marks under operating conditions.
Conclusion
Fiber laser color marking opens a world of customization and decorative options on metals like stainless steel and titanium. Using a MOPA fiber laser with controlled pulse width and frequency allows for a range of durable, vibrant colors. Always test your settings, maintain clean surfaces, and document results to ensure consistent, high-quality markings.
