# Materials

Which materials are safe for the laser and other machines, and which are prohibited.

# Laser-Safe and Prohibited Materials

Some materials are perfectly safe to laser. Others release toxic or corrosive gases, damage the machine, or catch fire easily. **If you cannot identify a material, do not put it in the laser.**

<p class="callout warning">To be confirmed: the approved materials list for WMI's laser. What a laser can cut depends on its type and power, so check with a trainer before cutting anything not on that list.</p>

## Never laser these

| Material | Why |
|---|---|
| **PVC and vinyl** (including vinyl sheet, many faux leathers, some foam boards and records) | Releases chlorine gas, which is toxic and corrodes the machine. |
| **Anything containing chlorine** | Same reason as PVC. |
| **Polycarbonate (Lexan)** | Catches fire and discolors rather than cutting cleanly. |
| **ABS** | Melts rather than cuts and gives off harmful fumes. |
| **Fiberglass and carbon fiber** | The resins give off harmful fumes. |
| **Coated or mirrored materials you cannot identify** | Coatings may contain any of the above. |

## Usually safe, if the machine is set up for it

These are commonly laser-cut or engraved. Ask your trainer which ones apply to our machine and what settings to use.

- Natural wood and plywood
- Paper and cardboard
- Cast acrylic
- Vegetable-tanned leather
- Natural fabrics such as cotton and felt

## Whatever the material

- Never leave the laser unattended. See **Digital Fabrication: Laser Cutter**.
- Make sure the exhaust or filtration is running. See **Shop Safety: Air Quality**.