Invisible Fluorescent Crayon Pale Green/Fluoresces Bright Green

Invisible Fluorescent - Green

DirectGlow Blacklight Reactive Invisible UV Ink Marker Pen Large 3 Section Blue Red Yellow for Ultraviolet Security Secret Messages Drawing Glow Party Favor (3 Markers with 3 Blacklights) - Yahoo Shopping

Fluorescent UV Marking Products by Sirchie

MAR-C0100 box of hundred blackl lite pen and fluorescent security marking device.

MAR-C0100 Bag of 100 invisible fluorescent blue security marking pens

Moon Glow - Neon UV Paint Stick Body Crayon for the Face & Body – Black - Yahoo Shopping

Invisible/colorless in normal light. Glows bright blue in UV blacklight. Please note, these markers do NOT glow in the dark. You must have a blacklight to get the glow effects. Extra large body with broad tip. Contains twice the ink as our standard sized markers! Safe for use on skin. Use for security marking (such as admissions) or create amazing invisible body art designs that glow in blacklight! These are the markers you want for semi permanent invisible marking.