UV light is highly effective at killing germs The ... Companies that sell UVC pen-like devices and UVC bottles claim to rid 99.99% of bacteria and viruses from water. Such products are typically ...

Create invisible ink with this UV pen making guide.

Highlighter pens contain chemicals that absorb visible light as well as ultraviolet (UV) light, which humans cannot see. The UV light “excites” the electrons in the ink’s molecules and ...

has recalled the “secret agent invisible spy pens”, “magic UV pen - fairies in the garden” and “light bulb key ring” from Australian stationery wholesale company Bobangles. All three ...

But it never took off, and for decades, UV light for disease prevention in public settings remained a niche technology, as it also came with two major limitations. For one, it’s dangerous to ...

UV light is now revealing some very ancient secrets by highlighting hidden patterns and colors in seashell fossils. Paleontologist Klaus Wolkenstein of the University of Göttingen in Germany ...

New research shows that the UV light in nail lamps could be harmful to your health, but you may not need to cancel your next appointment. Credit...Eric Helgas for The New York Times Supported by ...