Invisible Marker emits fluorescence under black light

The ink is completely invisible and leaves no marks, it glows fluorescent blue under black light.

The fluorescent felt is odourless, harmless, and allows markings or information to be concealed.

5.50£ tax incl.


Fluorescent Invisible Ink Felt

The invisible ink pen allows you to write completely invisible messages on a variety of substrates.

The fine tip produces 1 to 7mm thick lines according to the pressure.

It contains a colourless fluorescent liquid, which reacts to different types of ultraviolet light (360 to 400 nm) and will appear fluorescent white/light blue.


Totally colourless and transparent!

Whatever the background colour (white, red, black), the invisible fluorescent marker leaves no visible trace or whitish residue.

Hide information or indications by making them invisible to the naked eye thanks to the fluorescent marker!


> Bank note marking
> Hare and Hounds Game
> Controlling visitors (entry and exit)
> Solvent-free, can be used on the skin

To detect and reveal the writings made with the invisible marker:

use a black light lamp*.


You can order the kit on this page: Invisible Marker + Black Light Pen


Composition: non-hazardous product.


The ink can be erased by rubbing with a sponge and water.


We also offer inks in 8 Blacklight colours

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