GLO-STAMP Invisible UV Ink Kit
Everything you'll need in one handy kit! Dries in 10-15 seconds and stays on for 12-18 hours. Includes 1 battery-powered UV light, 1 stamp pad, 7 ID stamps, 1 marking pen, and 1 - 4 oz. bottle of UV ink. Great for nightclubs, discos, amusement parks, charities, schools, electronic and medical industries, and home security ID. Can be used on skin or plastic. Waterproof.