Permanent Black Marking on Metal with Advanced Optowave’s Picosecond Laser Sources

Permanent Black Marking on Metal with AOC’s Picosecond Laser Sources

Deep contrast, zero damage, and production-grade repeatability with AOPico Montauk & AMark

Why black marking—and why picosecond?

If your parts need high-contrast, permanent identification (UDI, QR/DataMatrix, serials, logos) on stainless steel, titanium, aluminum, and other alloys, black marking is the benchmark. Instead of cutting material (engraving) or adding inks, picosecond (ps) lasers engineer the surface micro/nano-texture and oxide/phase composition to produce a stable, true-black appearance—without degrading the substrate.

Why ps is different: ultrashort pulses confine energy to the interaction zone, which minimizes the heat-affected zone (HAZ). The result is crisp edges, no burrs, and preserved corrosion resistance, even after sterilization, cleaning, or harsh service.

The AOC advantage: two ps laser source series

Both AOPico Montauk and AMark are picosecond laser sources designed for black marking on metals and other precision surface processes.

AOPico Montauk — performance-focused ps source

1. IR/Green/UV options to match alloy and finish.
2. Excellent beam quality (M²) for micro-textures that yield deep, multi-angle black.
3. Broad process window for tight edge acuity and short cycle times.
4. Integrates cleanly with galvos, scanners, vision, and motion.

AMark — cost-effective ps source for marking

1. Optimized for high-throughput, high-contrast black marking at attractive TCO.
2. Stable ps output and practical parameter ranges for fast recipe setup.
3. Ideal for OEMs and machine builders needing scalable, repeatable ps capability.
4. Drop-in integration with standard marking workstations and production lines.

Outcomes you can expect

1. Deep, uniform black readable at multiple angles.
2. Minimal HAZ—no microcracks or recast.
3. Production-ready consistency across lots and shifts.

Where ps black marking excels

1. Medical devices (UDI): Black, permanent codes on stainless instruments/implants; withstand autoclave and cleaning cycles.
2. Aerospace & automotive: Durable traceability on nickel alloys, tool steels, and aluminum—with no compromise to surface integrity.
3. Consumer electronics: Premium black branding/functional marks on stainless or anodized aluminum housings.
4. Industrial tooling: Long-life, scannable identifiers on hardened steels.

Metals covered: 304/316/17-4 stainless, titanium and Ti alloys, aluminum (incl. anodized), tool steels, nickel alloys.

“Thinking through” the recipe (how we get deep black, consistently)

AOC’s Application Lab optimizes fluence, repetition rate, hatch pitch/overlap, scan strategy, and defocus for each alloy/finish.

Best-practice notes:

1. Start near modification threshold, increase overlap for a richer black while monitoring thermal load.
2. Fine-pitch cross-hatching reduces specular glare, improving multi-angle readability.
3. Slight defocus helps homogenize energy on mirror-polished alloys and suppress micro-spatter.
4. Clean, oil-free surfaces ensure uniform oxidation/phase transformation.
5. Inline QA: vision grading for contrast/edge acuity/code grade; periodic corrosion and wipe tests.

Why picosecond beats conventional methods

1. vs. mechanical engraving: No tool wear or burrs; better corrosion performance.
2. vs. nanosecond-only marking: Lower heat input → darker black with cleaner edges on sensitive alloys.
3. vs. inks/labels: Nothing to peel or fade; permanent, consumable-free.

Implementation paths

1. Integrate AOPico Montauk when you need the widest process window and top beam quality for complex alloys/finishes.
2. Integrate AMark when you want cost-effective, high-throughput ps marking with fast deployment.
3. Pilot to production: Send parts to AOC for sample marking → receive recipe + cycle-time/ROI estimate → scale to line.

Results that matter to manufacturing

1. Permanent, high-contrast black marks (UDI/QR/DataMatrix/logo).
2. Audit-ready traceability for regulated industries.
3. Lower total cost vs. consumables; high uptime and minimal maintenance.
4. Brand-grade aesthetics on visible surfaces.

Get started

Tell us your alloy, finish, and code specs. We’ll return a validated process window, sample parts, and a clear path to cycle time and cost per mark—with either AOPico Montauk or AMark as your ps source.

Contact: Info@a-optowave.com