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Rust, paint, stain, and coatings removed without chemicals or surface alteration.

Equipment, services, and training for starting or growing a laser cleaning business. Laser Cleaning & Restoration (or Laser ablation) uses a high-energy laser beam to safely remove contaminants, coatings, and buildup from a surface without damaging the material underneath. Here’s how it works: ✔ The laser targets the surface with precision ✔ Unwanted coatings or contaminants absorb the energy ✔ The absorbed energy causes them to vaporize into gas ✔ What’s left? A clean, untouched base surface In simple terms—we use advanced laser technology to restore and clean surfaces efficiently, without harsh chemicals or abrasive blasting. It’s fast, eco-friendly, and highly effective. Puretech offers pickup/drop-off services as well as a mobile laser cleaning service, bringing cutting-edge cleaning and restoration solutions directly to you. This option reduces downtime and eliminates the hassle of transporting items, particularly ideal for machinery or equipment that cannot be moved. What Can We Clean? Our services cover a wide range of industries and applications, including: ✔ Paint and rust removal from metal ✔ Coating removal from wood (including kitchen cabinets) ✔ Mold remediation ✔ Soot removal (fire/smoke damage) ✔ Graffiti removal ✔ Marine, aerospace, automotive, injection molds and more If you have a question or a project in mind, or want to schedule a free demonstration, let’s talk! We’d love the opportunity to show you what Puretech can do.

Raise the pulse frequency on your laser and pulse energy drops. That’s on the graphic for this post, and if it reads bac...
10/09/2026

Raise the pulse frequency on your laser and pulse energy drops. That’s on the graphic for this post, and if it reads backwards, you’re not alone. More pulses per second sounds like it should mean a harder hitting laser. It doesn’t, and the reason comes straight from the equation in the wattage post: average power equals pulse energy times pulse frequency.

Your laser only puts out so much power. Pulse frequency and pulse energy are stuck dividing that number between them. Raise the pulse frequency and each pulse has to shrink to fit the same power budget. Lower it and each pulse gets a bigger slice.

Pulse energy isn’t a dial. There’s no k**b labeled “millijoules” on these machines. Power, pulse frequency, and pulse width are what you set, pulse energy is what falls out of all three. For this post we’re holding pulse width steady so we can isolate what power and pulse frequency are doing on their own.

So why raise pulse frequency at all? Because it decides how fast you cover ground. A 2022 study on pulsed fiber laser cleaning found pulse frequency drove about three quarters of the change in processing rate, while pulse energy barely moved it. Pulse energy mattered far more for how clean the surface came out, driving over half the change in leftover residue. That study used a picosecond laser stripping coating off cutting inserts, not the nanosecond machines doing rust and paint on a job site, but the pattern holds: pulse frequency is how many pulses land each second, pulse energy is how much energy each one carries.

Chasing speed, lean on pulse frequency. Chasing a coating that won’t quit on the first pass, you want more energy per pulse, which means backing pulse frequency down.

Pulse width is the piece we held constant here, and it deserves its own post, since changing it shifts what power and pulse frequency combinations the hardware can even produce. That’s where we’re headed next.

Just a friendly PSA.FYI: Cast aluminum can be highly reflective at 1064nm, even when the surface looks dull, gray, or he...
09/29/2026

Just a friendly PSA.

FYI: Cast aluminum can be highly reflective at 1064nm, even when the surface looks dull, gray, or heavily textured.

Visible appearance doesn’t tell you how a material will interact with an infrared laser. Roughness and oxidation can scatter the beam differently than polished aluminum, but the underlying aluminum is still reflective.
If you’re laser cleaning cast aluminum with a 1064nm system, treat it as a reflective material and take the appropriate precautions.

Don’t judge reflectivity by how shiny the surface looks. You should avoid holding the laser head perfectly perpendicular to the surface when practical.
A slight angle can help prevent a strong specular reflection from traveling straight back toward the laser head, but it does not eliminate the hazard.

Scattered/reflected 1064nm energy can still travel in other directions.
The risk is, depending on the optical design, a strong back-reflection from a reflective aluminum surface can travel back through the scan head and potentially damage optical components or, in some circumstances, the laser source.

What does spot size actually have to do with how hard a laser cleans?Pulse energy tells you how much energy is packed in...
09/28/2026

What does spot size actually have to do with how hard a laser cleans?

Pulse energy tells you how much energy is packed into each pulse. Spot size tells you how much surface area that energy gets spread across. Put those two together and you get fluence, the actual energy density hitting the material, measured in joules per square centimeter.

Think about focusing sunlight with a magnifying glass. The amount of sunlight hitting the ground doesn't change, but concentrate it down to a pinpoint and it can melt a coin. Laser cleaning runs on that same principle.

Fluence is pulse energy divided by the area of the spot it lands on. Shrink the spot and fluence goes up. Widen it and fluence goes down, even with the same pulse energy behind it.

But smaller isn't automatically better, and it isn't the only thing that matters either. Beam profile, pulse duration, frequency, scan speed, coating thickness, and the substrate itself all play a part in what actually happens at the surface.

One study on paint removal from aluminum alloy turbine blades found an effective window of roughly 17 to 27 joules per square centimeter for full paint removal without damaging the part underneath. Push past about 35 joules per square centimeter and the researchers saw the substrate itself start to remelt and pit. Those numbers are specific to that coating, that substrate, and that laser setup, they aren't a universal threshold for laser cleaning in general, but they show why fluence is the number that actually determines whether a pulse does its job instead of just warming the surface.

This is also why two machines can carry the same wattage and the same pulse energy rating and still behave nothing alike. If one is focusing that pulse into a smaller spot than the other, its fluence can be significantly higher, even though both spec sheets say the same thing.

Smaller spots deliver more energy per pulse but cover less ground with each pass, so it isn't a question of which one is better, it's a question of which one fits the job. Heavy rust on a steel beam calls for something different than delicate work on thin sheet metal or wood.

So when you're comparing laser cleaners, wattage is only part of the story. Pulse energy, spot size, beam profile, pulse duration, and the rest of the process parameters all shape what the laser actually does once it hits the surface.

Introducing the Continuous Max. 1500W of continuous wave cleaning built for the heavy stuff, thick coatings, stubborn ru...
09/18/2026

Introducing the Continuous Max. 1500W of continuous wave cleaning built for the heavy stuff, thick coatings, stubborn rust and bigger jobs.

Here's the surprising part. It's about half the weight of most water-cooled CW machines in its class. Similar power, dual-axis scanning head and way less machine to haul around.

Built to order, not sitting in a warehouse. Financing available.

Comment or call 317-499-1640 for early access pricing.
puretechlaser.com

09/16/2026

Iron Bed frame from the late 1800’s. It was so much fun doing this job! Used the Puretech Pulse Case 300W, 5mJ, Air-Cooled Pulse Laser System. More videos on this project coming soon, there were so many layers of paint in some areas!

09/15/2026

Continuous Wave Laser Systems are Historically Large, Heavy and a Difficult addition to Mobile Cleaning Applications. On Friday, that all changes

What's the difference between a Gaussian and Top-Hat beam profiles, and why does it actually matter for laser cleaning?W...
09/15/2026

What's the difference between a Gaussian and Top-Hat beam profiles, and why does it actually matter for laser cleaning?

Wattage and pulse energy tell you how much energy the laser is putting out. Beam profile tells you how that energy is distributed across the spot, and that changes how the laser interacts with the surface.

A Gaussian profile is shaped like a bell curve. Most of the energy sits in the center of the spot and tapers off toward the edges. A Top-Hat profile is designed to distribute the energy much more evenly across the spot, rather than concentrating it in the center.

Think of it like painting with a spray gun versus a roller. A spray gun lays its heaviest coat down the middle and thins out toward the edges, so you have to account for that as you overlap each pass. A roller puts down a more even coat across its width.

Laser cleaning works in a similar way. With a Gaussian profile, the center of each pass receives more energy than the edges, so scan speed and overlap become especially important when you're trying to achieve a uniform result. A Top-Hat profile distributes the energy more uniformly across the spot, which can make it easier to maintain consistent results across each pass.

That doesn't make Top-Hat simply the better profile, though. A study published in Applied Optics (link to article pinned in comments) compared the two profiles for removing paint from marine steel and found that the Gaussian profile increased the surface hardness of the steel underneath by about 21% and paint adhesion by nearly 33%, along with improved corrosion resistance. The Top-Hat profile left the substrate properties largely unchanged, but cleaned roughly 20% faster.

So, Gaussian and Top-Hat aren't a better option and a worse one. They're built around different priorities. Gaussian can increase surface hardness and corrosion resistance under the right processing conditions. Top-Hat can provide higher cleaning efficiency with a more uniform energy distribution. Neither one replaces the other, and neither one makes up for ignoring the rest of the spec sheet.

Beam profile is one more specification that doesn't stand alone. Wattage, pulse energy, spot size, pulse duration, scan speed, overlap, and beam profile all work together to determine what a laser actually does to the surface in front of it. Any one of them by itself will only ever tell you part of the story.

What are millijoules, and what role do they actually play in laser cleaning?Wattage is usually the first number people h...
09/09/2026

What are millijoules, and what role do they actually play in laser cleaning?

Wattage is usually the first number people hear about a laser cleaning system, 300W, 500W, 1000W and so on. It measures the laser's power output over time. Millijoules measure something different, the energy contained in each individual pulse.

And in pulsed laser cleaning, that matters because the way that energy is delivered, pulse by pulse, directly affects how the laser interacts with the material you're cleaning.

Think about it like a truck. You can have a high horsepower and still have a hard time getting a loaded trailer moving if the rest of the drivetrain and traction aren't there. Horsepower (Wattage) tells you how much power the engine can produce over time, while torque (Millijoules) tells you about the rotational force available at the wheels.

Laser cleaning works the same way. Wattage tells you how much power the system can deliver over time. Millijoules tell you how much energy is contained in each individual pulse.

That doesn't mean higher millijoules automatically means better or faster cleaning. Pulse energy has to be considered along with other factors like spot size, beam profile, pulse duration, frequency, scanning speed, and the material you're working on. Those factors determine how that energy actually reaches the surface and interacts with it.

That's why the right pulse energy for delicate paint removal can be very different from what you'd use on heavy rust or thick coatings. It's also why two machines with the same wattage can perform very differently depending on their pulse energy and the rest of their specifications.

Wattage alone doesn't tell you how much energy is in each pulse, and millijoules alone doesn't tell you how much power the system can sustain over the course of a job.

So, wattage isn't the wrong number to ask about, it's just not the whole picture.

If you're comparing pulsed laser systems, ask for the millijoule rating right alongside the wattage. One tells you the laser's power over time, while the other tells you how much energy is contained in each individual pulse, and you need both to understand what you're actually getting. The two numbers are also mathematically related through repetition rate (average power equals pulse energy multiplied by repetition rate), so wattage and millijoules aren't completely independent specs. Spot size, pulse duration, frequency, scanning speed and beam profile round out the picture too, but that's a conversation for another day.

Spend enough time around this industry and you start noticing something. A lot of the people selling lasers have never a...
09/04/2026

Spend enough time around this industry and you start noticing something. A lot of the people selling lasers have never actually run one, except the day somebody shot a marketing video and handed them a cleaning head. So, when something goes wrong on an actual job, they rely on scripted answers. Can they tell you why the machine's doing what it's doing right in front of you?

None of that makes them dishonest. It means they're selling something they've never actually leaned on. There's a difference between knowing what a laser is supposed to do and knowing why it's actually behaving that way, on a part that doesn't match the demo video, on a timeline that doesn't care about ideal conditions. And let's be honest, conditions are never ideal in this industry.

That gap is the real problem, and it's the part no spec sheet shows you. Anybody can hand you a wattage and millijoule rating, but nobody can hand you the hours, the jobs, the times the settings that worked on a similar job didn't work today. What those hours actually buy you is understanding your system, what the parameters do, and how they work for or against each other.

I'm not telling you to distrust every sales rep in this business. I'm telling you to ask the one question that actually tells you something before you buy from anybody in it: how many hours have you personally spent behind the beam.

09/04/2026

Stain removal has never been easier. With the right equipment and the right settings the process of removing stain from wood will never be the same.

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