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Ultra Violet Water Based Yellow 395 nM UV Pen

Product number: NWS-UVP1YE

UV pen for marking your valuables. UV ink can't be seen unless under UV light.

Weight: 0.04 kg
Ready for shipping
An Ultraviolet (UV) marker is a pen whose marks are fluorescent but transparent: the marks can be seen only under an ultraviolet light. They are commonly used in security situations to identify belongings. These pens produce an ink that is only visible under UV light (black light). You can use one of these to add hidden clues or coordinates to your caches. They are permanent markers and will easily write on most surfaces.

Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range 10 nm to 400 nm, corresponding to photon energies from 3 eV to 124 eV. It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the colour violet. These frequencies are invisible to humans, but visible to a number of insects and birds.
UV Ink Demonstration
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