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What Never Goes In A Laser

Check a material before you cut it. Every entry here is quoted from the manufacturer or the institution that published the prohibition, with a link, so you are not taking our word for it.

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Trade names work too. Sintra, Forex, Teflon, Bakelite, Garolite.

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Most laser material advice online is written by people selling lasers, and it is softer than the manuals that come with them. This page does the opposite: it carries only what a manufacturer or an operating institution has put in writing, quotes it in full, and links it.

The one that gets argued about

PVC is the material the hobby keeps relitigating, and the answer from the people who build and run these machines is not ambiguous.

Epilog Laser, in the safety section of its own machine manual: Do Not Engrave or Cut PVC: Never engrave or cut any material containing PVC or vinyl. When engraved, a corrosive agent is produced that will destroy your machine. Your warranty will be void if your machine is damaged by corrosion from engraving or cutting PVC or Vinyl.

Trotec lists polyvinyl chloride among materials that should not be processed with a laser engraver or a laser cutter because of their chemical make-up, adding that processing these materials creates dangerous gases or dust.

Georgia Tech's laser cutter operating procedure, written for a room full of students: Know what you're cutting - don't cut materials that contain chlorine (Never cut PVC, vinyl, polycarbonate).

And two laser companies who say otherwise

We are naming these because we read the pages ourselves, and because anyone searching this question will find them first.

LaserPecker publishes an article titled "Can You Laser Cut Vinyl? Is it Safe?" that opens Yes, laser cutting vinyl is possible, but it's important to consider some factors to ensure safety and successful results. Further down, under a heading listing types of vinyl "commonly considered safe for laser cutting", it says: 1. Polyvinyl Chloride (PVC) Vinyl: PVC vinyl is often used in the sign-making industry and is generally suitable for laser cutting. The remedy it offers is ventilation.

Thunder Laser USA states the hazard correctly and then treats extraction as the answer: However, cutting PVC releases harmful chlorine gas, which can damage the laser cutter and harm the operator's health. If you work with PVC, it is critical to have proper ventilation and follow safety guidelines.

Extraction moves the gas out of the room. It does not stop it being made, and it does not stop it condensing on the rails, the lens, the mirrors and the control boards on the way out. That is what Epilog is describing when it voids the warranty for corrosion. A vented machine cutting PVC is a machine being destroyed more politely.

Two warnings about how you run it, not what you put in it

From the same Epilog safety section, because fire is the risk people underrate: Do Not Operate Machine While Unattended: Never operate your machine without someone watching the system. There is a significant risk of fire if the machine is set improperly, or if the machine should experience a mechanical or electrical failure while operating. And separately, Do Not Vector Cut While Machine is Unattended - cutting is where the fires start, not engraving.

How to find out what you are actually holding

Ask whoever sold it for the safety data sheet and read the composition. That is Epilog's own instruction: the sheet will indicate whether or not it contains elements that are potentially harmful to your engraving system. If nobody can tell you what a sheet is made of, that is your answer. Sign board, banner material and anything sold by the roll deserve the question before the laser does.

The underlying rule, from Trotec, is worth memorising because it covers materials nobody has written a page about yet: Any materials containing halogens (fluorine, chlorine, bromine, iodine and astatine), epoxy or phenolic resins. If the data sheet names one of those, it does not go in the laser.

Where every entry on this page came from

Read on 19 September 2026. If one of these documents changes, this page is wrong until we re-read it.

  • PVC and vinyl, Kydex, and the fume and fire warnings Epilog Laser, Mini 18/24 & Helix Laser System Manual (Model 8000), safety section · the manual PDF, and Epilog's unsafe materials FAQ for the Kydex line
  • PTFE, PVB, carbon fiber, chromium (VI) leather, beryllium oxide, the halogen rule, epoxy and phenolic resins, and the flame-retardant and heavy-metal cautions Trotec Laser, "Which materials are not suitable for laser cutting and engraving?" · troteclaser.com
  • Polycarbonate, and the chlorine rule as an operating instruction Georgia Tech School of Architecture, laser cutter standard operating procedure · the SOP PDF
  • The two accounts that disagree, quoted so you can check us LaserPecker, "Can You Laser Cut Vinyl? Is it Safe?" · Thunder Laser USA, "How to Cut Vinyl with a Laser Cutter"
  • Materials not on this list Absence is not permission. This page carries only materials somebody has put in writing. If what you are holding is not here, get its safety data sheet; a material nobody will document is not a material to experiment on.

Questions this tool gets asked

Can you laser cut PVC?

No. Epilog's own laser manual puts it as plainly as it can be put: never engrave or cut any material containing PVC or vinyl, because a corrosive agent is produced that will destroy your machine, and the warranty is void if it does. Trotec lists PVC among materials that should not be processed at all because of their chemical make-up. The gas is hydrogen chloride, which becomes hydrochloric acid on anything damp, including the inside of your lungs and the inside of your laser.

Can ventilation make PVC safe to laser?

No, and this is the most common bad advice in the hobby. Extraction moves the gas out of the room; it does not stop it being made, and it does not stop it condensing on the rails, the lens, the mirrors and the boards on its way out. Epilog voids the warranty for corrosion damage from cutting PVC, which tells you what they expect a vented machine to look like afterwards. Two laser companies' own articles do describe PVC as workable with good ventilation. Both are quoted and linked on this page so you can read them and judge for yourself.

How do I know if a material contains PVC?

Ask the supplier for the safety data sheet and read what it is made of. Epilog's guidance is exactly this: the data sheet indicates whether the material contains elements that are potentially harmful to your engraving system. If nobody can tell you what a sheet is, do not laser it. The names to watch for are PVC, polyvinyl chloride, vinyl, and trade names like Kydex, Sintra and Forex. Anything sold as sign board or banner material deserves the question.

Is Kydex safe to laser?

No. Kydex is a PVC and acrylic alloy, so it falls under the PVC prohibition. Epilog names it directly, saying that materials such as Kydex contain PVC. People usually meet it making knife sheaths and holsters, where it is thermoformed instead.

Can you laser cut polycarbonate?

It is on the do-not-cut list of the institutions that run these machines daily. Georgia Tech's laser cutter procedure names it beside PVC and vinyl. It also cuts badly: polycarbonate absorbs the beam poorly, goes amber at the edge and tends to catch fire rather than part cleanly. If you need a clear sheet that lasers well, cast acrylic is the material people actually use.

Is chrome-tanned leather safe to laser?

No. Trotec lists leather and artificial leather containing chromium (VI) among the materials that should not be processed. Vegetable-tanned leather is the one that lasers. The trouble is that most inexpensive leather and effectively all faux leather is chrome tanned, and it is not obvious by looking. If the supplier cannot tell you which tannage it is, treat it as chrome and do not laser it.

What about carbon fiber, PTFE and circuit board material?

All three are on Trotec's prohibited list. Carbon fiber gives off dust and gas you do not want, and the dust is conductive inside a machine. PTFE, sold as Teflon, is a fluorine-bearing plastic. Circuit board stock is usually both an epoxy resin and a brominated flame retardant, which puts it on the list twice. Trotec's underlying rule covers all of them: any material containing a halogen, epoxy or phenolic resin is out.

Does anything I enter leave my browser?

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