Don't Ever Do this with your laser engraver: Why PVC is Dangerous for Laser Cutting

Why You Should Never Laser Cut or Engrave PVC (and Safer Alternatives)

When it comes to laser engraving, the choice of materials is crucial—not only for getting the best results but also for ensuring your safety. One of the most dangerous materials to avoid is PVC (Polyvinyl Chloride). Here’s why you should never use PVC, which other materials to watch out for, and what safer alternatives to use for your next laser project.

Why PVC is Dangerous for Laser Cutting

Polyvinyl Chloride (PVC) is a popular plastic found in pipes, vinyl flooring, and signage. But it’s extremely unsafe for laser work. When heated by a laser, PVC releases chlorine gas—a toxic and corrosive substance that’s harmful to both you and your equipment.

• Toxicity: The chlorine gas released during engraving can cause severe respiratory issues and long-term health problems.
• Corrosion: Chlorine gas corrodes metal parts, mirrors, and lenses inside your laser. We’re not kidding—this can completely destroy your machine!
• Environmental Damage: These gases are harmful to the environment and difficult to contain without specialized filtration systems.

Other Materials to Avoid

PVC isn’t the only risky material. Below are other materials that can emit toxic fumes, damage your equipment, or simply produce poor engraving results:

1. ABS (Acrylonitrile Butadiene Styrene)
   Found in toys and household goods, ABS emits cyanide gas when lasered and melts into a sticky mess—definitely not worth it.
2. Polycarbonate
   Common in windows and electronics, polycarbonate doesn’t cut cleanly and produces charred, uneven edges. It’s also prone to catching fire.
3. Fiberglass
   Made of plastic reinforced with glass fibers, fiberglass releases toxic fumes and is unsafe for laser engraving.
4. Coated Carbon Fiber
   Raw carbon fiber is fine, but once coated with epoxy or resin, it can release hazardous gases and ruin your optics.

Safer Alternatives

Want to stay safe and get great engraving results? Stick to materials that are laser-friendly:

• Wood: A classic engraving material. Avoid pressure-treated wood, which contains chemicals.
• Acrylic: Cuts cleanly, engraves beautifully, and doesn’t produce toxic fumes.
• Vegetable-Tanned Leather: Engraves well and smells great—just avoid synthetic leathers, as they often contain PVC.
• Glass: Can’t be cut with a CO₂ laser but engraves beautifully for awards, gifts, and décor.
• Coated Tumblers: Stainless steel tumblers with powder coating are safe to engrave—your laser simply removes the coating to reveal the steel underneath. Perfect for use with a PiBurn Rotary—just spin and engrave!

Conclusion

Lasers are powerful, precise tools—but not every material is laser-safe. PVC tops the “do not cut” list because of the dangerous chlorine gas it emits, which can harm your health, your environment, and your machine. Always verify what your material is made of before engraving.

Safer choices like wood, acrylic, and untreated leather will give you stunning results without putting you—or your laser—at risk.

Stay safe, and happy lasering!