| Term | Definition |
|---|---|
| Ultrasonic Iron |
This is a type of iron that is used as part of connecting hair extensions as part of the cold fusion technique. This technique does not use heat, but rather electromagnetic energy to melt the keratin. These irons are becoming more and more popular as they do not require time to heat up, are effective in melting the keratin, and for many stylists and customers, they feel more comfortable when there is no heat. |