Safety gear to buy

Take this seriously

A laser cutter is not a toy. Even a 5W diode laser can permanently blind you in a fraction of a second. A 40W CO2 machine can ignite wood almost instantly if the beam dwells in one spot. Getting the safety setup right before you switch anything on is not optional.

The good news: the required gear is affordable and the habits are easy to build.

Eye protection: your top priority

Laser safety glasses are the single most important purchase. Regular sunglasses offer zero protection. Laser light is monochromatic and will pass straight through general-purpose tinted lenses without slowing down.

• Wavelength match: glasses are designed for specific wavelengths; diode lasers (450nm) need different glasses than CO2 (10,600nm) or fibre (1,064nm); check your machine's wavelength and buy accordingly
• OD rating: Optical Density measures how much the lens attenuates the beam; OD4+ is the minimum for hobby use, OD5–OD6 gives more headroom
• Visible light transmission: you still need to see clearly; look for lenses with >25% visible light transmission so you're not straining to work

Decent glasses start around £15–40. Don't buy unbranded pairs with no certification. Look for CE or ANSI Z136 marks. And even with an enclosed machine, keep glasses nearby whenever the lid is open and the machine is powered.

Fume extraction: protect your lungs

Cutting and engraving produces fumes. Some are unpleasant; some are genuinely hazardous.

• MDF and plywood contain formaldehyde-based glues that release toxic fumes when cut
• PVC and vinyl release chlorine gas — never cut these
• Acrylic produces sweet-smelling fumes that are irritating in concentration
• Coated materials can release all sorts of unknowns; treat them with caution

For extraction, most home users have three options. The cheapest and most effective is external ducting: run a 4" inline duct fan from the machine to outside, with a carbon pre-filter to catch particles before they reach the fan. Some enclosed machines (the xTool P2, for example) have compatible air purifiers using HEPA and activated carbon filters. They don't vent outside but work well for light use. Commercial fume extractors from manufacturers like Bofa or Purex are thorough, but expensive and more relevant to professional setups.

For home use, a decent inline fan with external ducting is usually the right call.

Fire safety

A laser beam that lingers too long in one spot, because a job failed, material warped, or you stepped away, can start a fire. It happens fast.

• Never leave the machine running unattended. This is the one rule that matters most
• Keep a CO2 or dry powder fire extinguisher within arm's reach (not water)
• A spray bottle of water nearby is useful for small spot fires
• Clear combustible materials away from the machine before starting
• If your machine has a flame detection sensor, make sure it's enabled
• After every session, check the cutting bed; wood can continue to smoulder after the job ends

Material safety

Before cutting anything, check it's safe to laser.

Material	Is it Safe?	Notes
Wood, MDF, plywood	✔️	Good extraction required
Acrylic (PMMA)	✔️	Fumes are irritating but not toxic
Leather (genuine)	✔️	Strong smell; extract well
Cardboard and paper	✔️	Watch for fire
Anodised aluminium	✔️	Diode/CO2 safe
PVC and vinyl	❌	Never cut: chlorine gas
Polycarbonate	❌	Doesn't cut cleanly; fumes
Carbon fibre	❌	Carcinogenic dust
Unknown plastics	❌	Test first or avoid entirely

What you'll need to buy

Item	Budget
Laser safety glasses (correct wavelength)	£20–40
Inline duct fan and ducting	£30–60
Carbon pre-filter	£10–20
CO2 fire extinguisher	£20–40
Total	£80–160

Small cost relative to the machine. Negligible cost relative to your eyesight.

Ready to choose a machine? Read the guide to picking your first laser or jump to the laser comparison table.