It works on a difference in absorption. Rust, paint and scale are dark and absorb the laser energy readily, so they heat and vaporise off the surface. Clean metal underneath is comparatively reflective and absorbs far less, so once the contamination is gone there is much less for the beam to act on. That makes the process somewhat self-limiting on the right materials, and it is why a correctly set laser can strip a painted panel without eating into the panel the way an abrasive disc would.

It is better at different things. Laser cleaning wins where media, masking, waste disposal or substrate damage are the problem: it uses no grit, needs no booth, cleans selectively so surrounding areas stay untouched, and does not erode the base metal. Abrasive blasting still wins on very large areas of heavy scale, where a booth moves more square metres per hour, and where a coating specification calls for a defined surface profile that blasting produces and laser cleaning generally does not. Decide from your actual constraint rather than from the technology.

Yes. Chemical-free refers to the process, not the by-product. Whatever is removed – rust, paint, oil, coating – is vaporised into fume and fine particulate, and that has to be extracted at source. Stripping old paint in particular needs extraction sized properly for it, and you should confirm what the existing coating is before removing it, because some older coatings require specific handling. The advantage over chemical stripping is that there is no liquid effluent to neutralise or dispose of, not that there is nothing to capture.

Decide from two numbers: how thick the layer you are removing is, and how many square metres you need to cover per shift. 1500 W suits light to moderate rust, thin coatings, weld seam cleaning and tooling maintenance. 2000 W is the general-purpose middle for mixed refurbishment and surface-prep work. 3000 W is for heavy scale, thick coatings and sustained large-area or production-rate cleaning. Under-powering is the common mistake – the machine cleans perfectly and still cannot cover the day’s workload.

Rust and corrosion, old paint and coatings, oxide and mill scale, weld seam discolouration and heat tint, oil, grease and residue, and mould or die release film. Two uses that buyers rarely anticipate are pre-weld and post-weld cleaning: taking a joint back to bare metal before welding removes the scale and coating that cause porosity, and removing heat tint afterwards finishes a stainless joint without pickling paste. Many shops buy the machine for rust and end up using it most around the welding bay.

It is a surface-contamination tool, not a bulk material-removal process. It will not take metal off – dressing a weld or correcting a dimension is still a grinding job. Very heavy scale or several coats of old paint over a large area need multiple passes rather than one sweep. Very reflective surfaces give the beam less to work with, and very dark substrates may need parameters set specifically for them. And it does not create the defined surface profile that some coating specifications require before painting.

Mild and carbon steel, stainless steel, aluminium and other metal substrates. Steel is where it is used most and works best, because the contrast in absorption between rust or scale and the clean steel underneath is large. Aluminium and more reflective metals are cleaned successfully but need parameters set for them. If your substrate is unusual, or you are cleaning something delicate where the surface underneath must not be altered at all, send us a sample and we will trial it before you order.

At 1500 W to 3000 W in an open area with no enclosure, this needs proper handling. Wavelength-rated eye protection is required for everyone in the working area, not just the operator, because the beam is invisible and reflects readily off bare metal. Because the machine is taken to the work, that controlled area has to be established at each new position rather than being a fixed part of the layout. Extraction is required, and the gun’s interlocks and safety switch must never be bypassed. We cover the whole setup during installation and training.

The construction is durable and the routine is short, since there is no media system, no compressor and no chemical handling to look after – which removes the biggest recurring costs that come with blasting and chemical stripping. The routine itself is: gun optics and nozzle inspection per the machine manual, cable and gun body checks because the machine is handled constantly, extraction filter changes – which load quickly when stripping old paint – cooling system checks, and an annual technical inspection. We go through the full schedule for your configuration during installation and training.

Price depends mainly on the power tier – 1500 W, 2000 W and 3000 W sit at clearly different points – along with any options specified with the order. We quote against a confirmed specification rather than publishing a fixed figure, because the right tier depends on what you are removing and how much area you have to cover. Send us a description of the contamination, the substrate and your area per shift for a detailed quotation, and mention if you need multi-machine pricing.

A 1-year warranty covering manufacturing defects in the laser source and delivery system, control electronics and the gun, handled directly by Sigma Mechotronics Pvt. Ltd. rather than through an agent or overseas supplier. Installation and commissioning at your premises, parameter setting for the contamination you are actually removing, and operator training on the cleaning modes and safe working are part of the supply. Spares are held in India, and every purchase comes with a GST tax invoice under your GSTIN.

Yes, and on this machine it matters more than on any other in the range. Cleaning speed and the finished result depend heavily on coating thickness, substrate and surface condition, and no published figure substitutes for seeing it on your own material. Send or bring a representative sample – the worst surface you actually have to deal with, not the easiest – and tell us what the surface has to look like afterwards. Facility visits to our Ahmedabad plant are welcome by appointment.