This is to help you learn more about our color codes and abbreviations. Each abbreviation on a UL Recognized Component represents the following color:
| Abbreviation | Color |
|---|---|
| AL | Aluminum |
| ALL | Any color |
| AM | Amber |
| AO | All opaque |
| AT | All transparent |
| BG | Beige |
| BK | Black |
| BL | Blue |
| BN | Brown |
| BZ | Bronze |
| CH | Charcoal |
| CL | Clear |
| CT | Clear Transparent |
| DK | Dark |
| GD | Gold |
| GN | Green |
| GT | Granite |
| GY | Gray |
| IV | Ivory |
| LT | Light |
| NC | Natural (no pigmentation) |
| OL | Olive |
| OP | Opaque |
| OR | Orange |
| PK | Pink |
| RD | Red |
| SM | Smoke |
| TL | Translucent |
| TN | Tan |
| TP | Transparent |
| VT | Violet |
| WT | White |
| YL | Yellow |
Miscellaneous abbreviations
The following abbreviations may be used in the column headings of individual recognitions.
| Abbreviation | Term |
|---|---|
| Min Thk. mm | Minimum thickness in millimeters |
| Flame class | UL 94 Flammability Classification |
| HWI | Hote wire ignition |
| HAI | High amp arc ignition |
| RTI | Relative temperature index |
| Elec | Electrical |
| Imp | Impact |
| Str | Strength |
| CTI | Comparative tracking index |
| HVTR | High voltage arc tracking rate |
| D495 | ASTM D495 arc resistance |
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