Our in house formulated UV Blacklight Reactive Invisible Ink for hand marking, body art, document marking, or other unique security applications. Only visible under black light. Ink is water resistant and very difficult to remove. Best viewed in dark or shaded area. Opticz Blacklight Reactive Invisible all purpose inks are suitable for use on skin and work best on porous materials. This ink is invisible, colorless and will glow bright blue under UV blacklight. Can be used on aluminum, cardboard, ABS, acrylic, rubber, cellulose, acetate, formica, nylon, polystyrene, polyethylene and most other materials with porous surfaces.

 Each high quality solid aluminum marker is filled with 15ml of our special blend UV ink. Ink is alcohol based so a little goes a very long way! Ink is formulated to fluoresce brightly under long wave ultraviolet light only. They do NOT glow in the dark without the use of a blacklight! Fast drying and non-transferable. Ideal for applying onto an already printed surface.

Package includes a keychain UV light that illuminates the ink flawlessly,

Each marker is hand made right here in the USA!