Invisble Red UV Blacklight Reactive Ink Marker Our neon red ink glows amazingly bright in blacklight! The color absoluetly blows away the traditional blue ink markers seen on countless pages elsewhere! These inks are fantastic for glow parties, birthdays, making hidden messages and security applications. Ink is alcohol based and fast drying. Very tough to remove and will easily adhere to any porous surface. Be advised ink may be slightly visible on bright white surfaces. Apply to off white or darker for best results. These are full sized markers packed full of our special blend invisible red UV ink so you get plenty of use with long lasting effects! Buy with confidence! Our markers are thoroughly tested and are of the highest quality. Guaranteed or your money back!