Invisible ink pen contains a special type of ink made from naturally fluorescent chemicals or organic compounds. When you shine a UV light down on a message or drawing made with invisible ink, the electrons within the ink’s fluorescent molecules are excited, briefly shifting to a higher-energy orbit around their nuclei. When those electrons shift back to their normal orbit, the absorbed energy is expelled in the form of visible light.
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Marty
Great. All children love and some big children. Great. I’ll take 5 more.
Shelia Stone
Fast shipping. Item works perfectly. Very happy! Thanks
Tillie Hartley
Very cool thing, inside the handle of the battery and also in the package there are batteries, it came quickly enough, writes very well, the flashlight is very bright, convenient to use
Stéphanie Arthur
Very cool pen, all as described. Ink is very resistant and then on almost all surfaces, special at night, ink is very clearly visible when to shine on them
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