A CO2 laser marking machine is a popular tool for engraving and marking various materials, including metals. However, CO2 lasers (typically 10.6 µm wavelength) are not ideal for deep marking on metals because metals highly reflect this wavelength, leading to inefficient energy absorption.
Best Laser for Deep Metal Marking
For deep engraving on metal materials, fiber lasers (1.06 µm wavelength) are far more effective because:
✔ Higher absorption by metals
✔ Greater peak power for deep engraving
✔ Precise and durable marks (suitable for industrial applications)
When to Use a CO2 Laser for Metal Marking?
A CO2 laser can still mark metals if:
Using a laser marking spray (e.g., Cermark, Thermark) to enhance absorption
Only surface annealing/coloring is needed (not deep engraving)
Marking anodized or coated metals (where CO2 works well)
Alternative for Deep Metal Engraving
If you need deep, permanent marks on metals, consider:
Fiber Laser Marking Machine (20W-50W for standard marks, 100W+ for deep engraving)
MOPA Fiber Laser (adjustable pulse width for better control)
UV Laser (for high-precision marking on sensitive metals)
