Laser Marking Brass and Copper: Reflective Metals
Last updated: May 2026
Short answer: fiber lasers mark and engrave brass and copper directly, with no coatings or chemicals. Both are reflective and harder to mark than steel. Brass is the easier of the two; copper is among the most reflective metals and benefits from more power and the control of a MOPA fiber laser.
Why are brass and copper trickier than steel?
At the fiber laser’s 1064 nm wavelength, brass and especially copper reflect a lot of the beam, and copper also conducts heat away quickly. That means more of the laser’s energy is lost before it can mark. Two things solve it: adequate power, and the pulse control of a MOPA source, which concentrates energy in short bursts the surface can absorb before the heat spreads. Brass marks readily; pure copper is one of the more demanding metals and is where extra power earns its keep.
What can you make with it?
- Brass: nameplates and plaques, plumbing and instrument fittings, musical-instrument parts, ammunition headstamps, decorative engraving, and jewelry findings.
- Copper: electrical and bus components, decorative work, and traceability marks where coatings are not wanted.
Which laser do you need?
Use a MOPA fiber laser. For brass detail, the 30W MOPA is plenty; for engraving and copper, lean toward the 100W MOPA M7 for the extra headroom reflective metals demand. See the full fiber laser range, and our overview of metal engraving machines. The same machines also handle stainless steel and aluminum.
Frequently asked questions
Can a fiber laser mark copper?
Yes, though copper is highly reflective and conducts heat fast, so it is the hardest of the common metals. More power and a MOPA source make it reliable; pure copper is more demanding than copper alloys.
Do I need a coating or spray?
No. A fiber laser marks bare brass and copper directly. Coatings are only needed with CO2 lasers, which cannot mark these metals at all.
Which is easier, brass or copper?
Brass. It is less reflective and marks much like other metals. Copper’s reflectivity and conductivity make it the tougher job.
Can I deep-engrave brass?
Yes. Higher power and multiple passes produce deep, tactile engraving in brass for plaques and dies.
