This multipurpose UV flashlight is made of strong and beautiful aluminum alloy. The UV Torch Blacklight is great for showing dried dog, cat and rodent stains as well as stains that cannot be seen with the naked eye. Can verify currency, ID card, passport, driver’s license and other documents. A black light can also act as a nail dryer. With it, you can find optical brighteners contained in baby clothes or cosmetics, safe. Items that do not contain optical brighteners will show a purple glow under a black light and a blue glow under a black light.