Opticz Blacklight Reactive Invisible Blue Ink All Purpose UV Marker with UV Light

All purpose formulated ink is safe for use on skin. Solid metal body with snap on cap is strong and durable. Matching metal mini UV light included.

Invisible UV Black Light Marking Inks and Pens

DirectGlow Black Light Luminous Glow Invisible Blue UV Ink Security Kit for Secret Marking Hand Stamping Ultraviolet Detection (Basic Kit) : Office Products

Invisible in regular light, glows bright blue in blacklight. The colors really pop in ultraviolet light but are undetectable in normal light. Choose

Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (4 Ounce Bottle)

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

Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue

Blacklight Pen

DirectGlow General Purpose Invisible Blue Ultraviolet

Opticz All Purpose Invisible Blue UV Blacklight Reactive Security

Blacklight Markers

DirectGlow Invisible UV Blacklight Reactive Pen Ink Marker (Yellow, 3 Markers) : Office Products

All purpose formulated ink is safe for use on skin. Solid metal body with snap on cap is strong and durable. Matching metal mini UV light included.

Opticz Blacklight Reactive Invisible Blue Ink All Purpose UV Marker with UV Light

DirectGlow

This ultraviolet marker can write invisibly on almost any dry surface, including metal, paper, glass, paint, skin, and currency. The markings remain invisible until illuminated under an ultraviolet light source (choose the Ultraviolet LED Flashlight for a light source). Ideal for marking personal property, sensitive notes, thief detection, and covert communications. The ink is heat-proof, waterproof, and non-toxic. Available in 3 ink colors: blue, red, and lime green.

Shomer-Tec Ultraviolet UV Markers and UV LED Flashlight and Combo Pack (Green)