# LLM-UV/5 UV marking vs fibre (sales steer)

- Source-Date (SAST): 2023-07-19 21:20
- Dest: public
- Review-after: 2027-02-28
- Status: current

## Facts

- SKU **LLM-UV/5** is the 5 W UV marking laser (showroom unit as of this date).
- UV marking is **endothermic** (ultraviolet), not heat-based, so it can mark heat-sensitive materials without the same thermal damage as a fibre marker.
- Suited to **glass**, **plastics**, **wood**, and **paper**. Fibre is generally more suited to **metals**; UV covers most non-metal marking.
- A 5 W UV beam is about **one third the width** of a 20 W fibre beam; UV absorption in the spot is described as **3×** vs fibre, compounding to about **9×** with the smaller spot.
- The set includes a **chiller** to hold diode temperature over long runs.