🔎 Fiber Laser Engraving Materials: The Complete 2025 FAQ
| Material category | Common examples | Fiber laser compatibility | Typical result / notes |
|---|---|---|---|
| Metals | Stainless steel, aluminum, titanium, brass, copper, gold, silver, tool steel | ✅ Excellent | Deep engraving, annealing (black/white marks), high-contrast serial numbers; industrial durability. |
| Anodized / coated metals | Anodized aluminum, painted metals, plated parts | ✅ Excellent | Bright white or high-contrast marks by removing coating; very fast cycle times. |
| Engineering plastics | ABS, PC, PBT, Nylon (PA), PEEK, PET, PVC (with caution), black acrylic | ✅ Supported | High-contrast marking (depends on additives). MOPA lasers deliver finer results on plastics. |
| Stone / hard materials | Granite, marble, slate, quartz, ceramic tile, concrete | ✅ Can engrave | Etching / shallow carving – black or white marks, depth up to 1–3mm. |
| Carbon fiber / composites | CFRP (carbon fiber reinforced polymer), fiberglass (with coating) | ✅ Marking possible | Dark black marks, low heat prevents delamination; ideal for aerospace part serialization. |
| Wood / leather / paper | Wood, leather, cardboard, textiles | ⚠️ Limited | Low contrast, burning risk; CO₂ lasers are better for organics. |
| Clear glass / pure crystal | Glass bottles, window glass, crystal | ❌ Not directly | 1064nm transmits through clear glass – requires marking spray or ceramic coating. |
Fiber lasers work on nearly all common metals: stainless steel, aluminum, titanium, brass, copper, gold, silver, iron, nickel, and tungsten. Stainless steel and titanium can produce black/white annealing marks, while anodized aluminum gives bright white results. For highly reflective metals like copper or bare aluminum, we recommend a reflection protection module or a MOPA laser source to avoid back-reflection damage.
Yes, but results depend on plastic additives and color. The most suitable plastics contain laser-sensitive additives: ABS (electronics housings), PBT (keycaps), PC (electrical parts), Nylon (PA), black acrylic, and polycarbonate. Light-colored or transparent plastics may produce low contrast. Using a MOPA fiber laser allows fine pulsewidth control, reducing burrs and achieving pure white or high-black marks.
✅ Common examples: mouse shells, headphone surfaces, USB enclosures, remote controls – all easily marked.
Absolutely. Granite, marble, slate, quartz, ceramic tiles, and general stoneware can be etched. Dark granite absorbs well and yields clear light or white textures. The laser melts/fractures the surface micro-layer, creating permanent marks.
⚠️ Note: natural stone with uneven grain may produce shade variations – always test first.
Anodized aluminum is one of the easiest materials for fiber lasers. The laser removes or bleaches the anodized layer, producing extremely high-contrast white or black marks. White marks typically use higher power + slower speed; black marks require short pulsewidth (MOPA). It’s very fast, ideal for nameplates, phone cases, cosmetic packaging, industrial panels, and high-volume production.
✅ Yes – using a MOPA fiber laser (Master Oscillator Power Amplifier). By using ultra-short pulses, the laser creates thin-film interference colors on stainless steel: yellow, blue, green, red, purple, and even multi-color gradients. No ink or coatings required. Standard (non-MOPA) fiber lasers produce only dark gray or black marks.
Yes. Carbon fiber absorbs 1064nm wavelength well. It’s used for serial numbers and logos in aerospace components, racing parts, and bicycle frames. Marks are usually black or matte black. Since the heat-affected zone is small, delamination risk is low, but we recommend low power and multiple passes to preserve fiber integrity.
Fiber laser wavelength (1064nm) passes through clear glass – direct engraving is not possible. However, there are workarounds:
- ① Apply ceramic marking spray or laser absorption paste – the laser transfers the coating to the glass, creating a permanent etch.
- ② With MOPA fiber laser + spray, you can achieve a frosted look. For frequent glass work, consider UV or CO₂ lasers instead.
Some industrial rotary setups also mark glass bottles using absorbent coatings.
❌ Absolutely avoid materials containing chlorine or fluorine: PVC, polyvinyl chloride, PTFE, halogenated flame retardants – these release corrosive hydrochloric/hydrofluoric acid gas, damaging your laser and posing health risks.
❌ Highly reflective bare copper or mirror-finished aluminum can cause back-reflection and damage the laser source (short marking sessions are acceptable).
❌ Wood, leather, paper – fiber lasers produce poor contrast, charring, and excessive smoke (CO₂ lasers are better).
✅ Always use fume extraction and run test samples.
Standard fiber laser (fixed pulsewidth) excels at deep metal engraving and annealing black marks. MOPA lasers offer adjustable pulsewidth (2–500ns), enabling:
- Softer, high-contrast white/gray marks on plastics
- Color marking on stainless steel (yellow, blue, green, red)
- Black marking on anodized aluminum
- Better performance on reflective materials
- Layer-selective coating removal without damaging substrate
Analyze your daily materials:
- Pure metal deep engraving / industrial marking → standard 20W–50W fiber laser (best value).
- Mixed metals + plastics, color stainless steel, black anodized aluminum → MOPA fiber laser (more flexibility).
- Coated metals / 3C electronics → 30W MOPA.
- Primarily glass, clear plastics → consider UV or CO₂ laser instead.
Most users start with a 20W–30W standard fiber laser, covering 80% of metal marking tasks.
🖼️ Application examples & material showcase
📌 Fiber vs CO₂ vs UV (quick guide): Fiber lasers = metals & engineering plastics. CO₂ = wood, glass, acrylic. UV = heat-sensitive plastics & cold glass marking.
✉️ Not sure if your material is compatible?
IEHK offers free sample testing – send us your material or contact our engineers.
📞 Contact IEHK for a custom solution