Laser marking uses a focused beam of light to create permanent, high-contrast marks on metals, plastics, and other materials without ever touching the surface.
Whether you're a manufacturing professional, a line integrator, or simply comparing marking technologies for the first time, this guide walks you through:
Laser marking is a non-contact process that uses a focused laser beam to modify the surface of a material and leave a permanent mark. Because the tool never touches the part, the process is precise, repeatable, and doesn't wear out like mechanical marking methods do.
It's used to create serial numbers, barcodes, 2D data matrix codes, logos, and text, the kind of markings that matter most when a product needs to stay traceable and identifiable for years, sometimes in harsh environments.
In short, laser marking is popular because it offers:
A laser marking system directs a concentrated beam of light energy onto the surface of a material. When the beam hits the surface, that energy converts into heat (or, in some cases, triggers a chemical reaction), producing a mark either on the surface or just beneath it.
Depending on the material and the result you need, that change can happen in a few different ways:
If you need to know if laser marking is better than other marking technologies for your project, here's a quick comparison:
|
Marking method |
How it compares to laser marking |
|
Inkjet printing |
Fast and low-cost upfront, but needs ink refills and regular nozzle maintenance. Laser marking has no consumables and produces a more durable mark. |
|
Dot peening |
A reliable, affordable way to mark metal parts, but limited in resolution and speed. Laser marking offers finer detail and can mark far more complex codes and logos. |
|
Chemical/electrolytic etching |
Effective for large batches, but requires stencils and electrically conductive parts. Laser marking skips the stencil step entirely and can switch patterns instantly for serialized parts. |
Automator works with laser, dot peen, scribe, and more, so if you're not sure which one fits your application best, that's exactly the kind of question our team is used to answering.
Laser marking is a family of laser sources, each suited to different materials and applications. Here's an overview of the main types.
Fiber lasers are the workhorse of industrial marking. They're low-maintenance, consumable-free, and excellent on metals and many plastics, which is why they're the go-to choice in automotive, security, and medical manufacturing.
Explore Automator's fiber laser marking machines to see this technology in action.
CO2 lasers are known for their durability and speed, making them a strong fit for packaging labels and organic materials like wood, paper, and some plastics. They can mark a high volume of characters per second, which matters a lot in automated production lines.
Often called "cold" lasers because they generate very little heat, UV lasers are the safest choice for delicate or heat-sensitive materials. They're especially good on plastics, silicon, and glass, where minimizing heat damage is critical.
Green lasers handle what fiber lasers struggle with: plastic components that don’t react with fubar laser or where the material needs a very fast color change.
Vanadate lasers offer excellent beam quality and depth of focus, and they're a good option for heat-sensitive materials like foils, plastics, and certain metals where consistent, precise results matter most.
Want to see the full range of Automator's laser marking machines, across all these technologies?
One of the biggest advantages of laser marking is the wide range of materials it can mark. Here's a closer look at the main categories.
Metals are, in general, the best-suited materials for laser marking:
Most common plastics (such as ABS, polycarbonate, nylon, PVC) mark cleanly with the right laser type. Polyethylene and polypropylene are more challenging due to low energy absorption but can still be marked effectively with UV or green lasers, or laser-sensitive additives.
Ceramics and glass are more delicate: they don't absorb all wavelengths equally and can crack under uncontrolled heat, but with UV or short-pulse lasers, they can be marked cleanly for electronics, medical devices, or decorative applications.
Wood, leather, and paper respond well to laser marking, typically with CO2 lasers. These materials absorb energy readily, which makes them easy to engrave but also means parameters need to be tuned carefully to avoid burning.
Quick reference:
|
Material |
Best-suited laser type |
|
Stainless steel, carbon steel |
Fiber laser (annealing) |
|
Aluminum, brass, titanium |
Fiber or green laser |
|
ABS, polycarbonate, nylon |
Fiber or UV laser |
|
Polyethylene, polypropylene |
UV or green laser |
|
Ceramics, glass |
UV or ultrafast laser |
|
Wood, leather, paper |
CO2 laser |
For the full picture, explore Automator's materials section.
Laser marking shows up across a wide range of industries, wherever traceability, branding, or compliance matter.
A few examples:
Not every supplier offers the same depth of experience, and choosing the wrong one usually shows up later, in integration headaches or marks that don't hold up.
A few things worth checking before you decide:
More than 80 years of experience, every major marking technology under one roof, and safety-first machines, including portable Class 1 systems that are still hard to find elsewhere.
Automator has been solving industrial marking challenges since the company's early, family-run days, and that hands-on approach hasn't changed: we help you pick the right technology for your material and application.
Today that means supporting customers across roughly 224 different sectors, from automotive and electronics to medical devices and logistics, with a catalog that spans laser, dot peen, scribe, roll, and hot marking. And because our machines are built to run for years with minimal spare parts, the relationship doesn't end at delivery: our team stays reachable for the long haul, which is exactly why so many customers come back to us years later for their next line.
475 Douglas Ave, Chillicothe
OH 45601
USA
Phone: +1 740-983-0157
Mail: infousa@automator.com
