# Materials List

## Approved Materials

<table><thead><tr><th>Material</th><th width="150">Thickness</th><th>Notes</th></tr></thead><tbody><tr><td>Acrylic / Plexiglas</td><td>1/4"</td><td></td></tr><tr><td>Delrin</td><td></td><td></td></tr><tr><td>Kapton Tape</td><td></td><td></td></tr><tr><td>Mylar</td><td></td><td></td></tr><tr><td>Paper / Cardstock</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr></tbody></table>

## <mark style="color:red;">Never Use</mark>

<mark style="color:red;">Any material that has a glue backing is not allowed. The glue will vaporize and may damage the lens.</mark>

| Material                         | Safety Hazard               | Notes        |
| -------------------------------- | --------------------------- | ------------ |
| ABS                              | Melts / cyanide             |              |
| Epoxy                            |                             |              |
| Fiberglass                       |                             |              |
| Food                             |                             |              |
| High Density Polyethylene (HDPE) | Catches fire & melts        | Milk bottles |
| Polycarbonate (PC)               |                             |              |
| Polypropylene Foam               |                             |              |
| Polystyrene                      |                             |              |
| Polyvinyl Chloride (PVC)         | Emits chlorine gas when cut |              |
|                                  |                             |              |


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