UV Invisible Ink Pen – Secret messages only you can read
Have a secret to keep? Whether it’s a hidden message, a private signature, or a discreet mark on your personal belongings, this UV invisible ink pen is the perfect tool. It writes completely invisibly, and the text is revealed instantly when you shine the integrated UV light located at the end of the pen. No extra accessories, no fuss—everything you need is in one compact device.
Note: The pen operates on 3x AG3 batteries, which are included. The ink is not refillable; once the ink is depleted, the pen should be replaced.
Why choose this model? (Key Benefits):
- 2-in-1 convenience — A pen and UV light in one 135mm device; no need to carry a separate torch to reveal your writing.
- Invisible in normal light, instant reveal under UV — Keep your messages truly private; secure and discreet.
- Ready to use — Comes with 3x AG3 batteries pre-installed, so you can start writing straight out of the box.
- Ultra-lightweight (9g) — Lighter than a standard ballpoint; fits easily into any pocket, pencil case, or bag.
- Versatile application — Works on paper, plastic, and leather; ideal for marking personal items, documents, banknotes, or invitations.
- A unique gift — An original, practical gadget that kids, teens, and adults will love.
Details and Performance
The invisible UV ink dries quickly on almost any surface and leaves no visible trace under normal lighting conditions—whether sunlight or artificial light. The ultraviolet LED lamp at the rear of the pen reveals the ink in less than a second. Powered by 3x AG3 batteries, it offers reliable performance for home and recreational use, and replacements are widely available when needed.
| Feature | Specification |
|---|---|
| Ink Type | Invisible in normal light, visible under UV |
| Integrated Light | Ultraviolet (UV) LED lamp |
| Power Supply | 3x AG3 batteries (included) |
| Casing Colour | Silver |
| Weight | 9 g |
| Dimensions | 135 x 14 mm |
| Compatible Surfaces | Paper, plastic, leather (results may vary on glossy surfaces) |
| Main Applications | Secret messages, property marking, counterfeit detection, creative projects |
| Recommended For | Children (with supervision), teens, adults, educational and recreational use |
Ideas for Use
- Write secret notes that can only be read by those with a UV light.
- Mark personal property — laptops, books, or tools — for quick identification if lost or stolen.
- Check banknotes and documents for fluorescent security features.
- Create invisible journals or temporary UV tattoos for fun with friends.
- Secure invitations and contracts with discreet UV signatures that are difficult to forge.
Package Contents
- 1x UV Invisible Ink Pen with integrated LED light
- 3x AG3 batteries (pre-installed)
Frequently Asked Questions
Is the ink safe for skin and children?
The UV ink is non-toxic and safe for use on paper and most surfaces. When applying to skin, we recommend caution and adult supervision for young children. If you have sensitive skin, please test on a small area first.
Does it work on all types of paper?
It works perfectly on standard paper. On glossy or plastic-coated surfaces, results may vary—we recommend testing on a discreet area before use.
Can it detect counterfeit banknotes?
Yes, the integrated UV light highlights the fluorescent security features found on genuine banknotes. For official or professional banking verification, we recommend using dedicated, certified equipment.
Is the ink permanent or erasable?
On paper, the ink is permanent once dry and cannot be rubbed off. On non-porous surfaces (such as plastic or glass), it can be removed using isopropyl alcohol or suitable cleaning solutions.
Product Video
Photo Gallery
**u* –
The kids have been playing “spy” for hours. The ink is truly invisible until you hit it with the light.