Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue

These UV ink markers are completely invisible in normal lighting, but illuminate incredibly bright under UV blacklight! Use these ink markers to implement security procedures, secretly mark your valuables, write hidden messages, artistic application, or just for plain fun! Each marker is full of our special blend of UV ink, so you get long lasting UV special effects. Markers are blacklight responsive ONLY and do NOT glow in the dark.

Each marker is 3.5 inches in length and comes with a separate UV pinch light
Ink is completely invisible in normal light; very bright under blacklighted conditions
Alcohol based. Dries quickly.
Adheres to any surface with ease. Does not wash off easily.
Three blazing bright colors: Blue, red, and yellow
Each marker is 3.5 inches in length and comes with a separate UV pinch light
Ink is completely invisible in normal light; very bright under blacklighted conditions
Alcohol based. Dries quickly.
Adheres to any surface with ease. Does not wash off easily.
Three blazing bright colors: Blue, red, and yellow

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