Welding curtains protect against UV light by acting as a physical barrier that absorbs and blocks the harmful ultraviolet (UV) radiation emitted during welding processes. These curtains are made from specially designed materials that have UV-resistant properties, typically incorporating polyvinyl chloride (PVC) or other polymers that are treated with UV inhibitors. 
When welding occurs, it generates intense UV radiation, which can cause skin burns and eye damage, such as "welder's flash" or photokeratitis. Welding curtains are engineered to filter out these harmful UV rays, reducing the risk of exposure to both welders and bystanders. The curtains are often tinted in specific colors, such as yellow, orange, or green, which are effective at absorbing different wavelengths of light, including UV radiation.
The curtains are strategically placed around the welding area to create a controlled environment, ensuring that the UV light does not escape into surrounding spaces. This containment is crucial in workshops or factories where multiple people may be working in proximity to welding operations. By blocking the UV light, welding curtains help maintain a safer work environment, preventing accidental exposure to harmful radiation.
Additionally, welding curtains can also protect against other hazards associated with welding, such as sparks, spatter, and intense visible light, further enhancing their protective function. They are designed to be durable, flame-resistant, and flexible, allowing for easy installation and repositioning as needed. Overall, welding curtains are an essential safety measure in industrial settings, providing effective protection against the dangers of UV radiation and other welding-related risks.