Invisible Ink Pens with UV LED – Keep your messages secret until you decide to reveal them
Write your message, and it remains completely invisible to the naked eye. Simply shine the integrated UV LED onto the paper, and your secret note appears instantly. These invisible ink pens are perfect for turning any note, map, or drawing into a well-guarded secret that only you can reveal.
Note: The UV LED emits a low-intensity light, safe for recreational use. Please avoid pointing the light directly into the eyes.
Why choose this set? (Key Benefits):
- Pack of 5 pens — perfect for group games, spy-themed parties, or classroom activities without needing to share a single pen.
- Integrated UV LED in every pen — no need for a separate torch; reveal your message using the same tool you used to write it.
- Completely invisible in normal light — no one can detect your text or drawings without the correct UV light source.
- Pre-installed batteries, ready to use — open the pack and start having fun immediately, with no extra purchases required.
- Ergonomic design: 13 cm length, 1.8 cm diameter — comfortable for both children and adults to hold.
- Works on paper, card, and smooth surfaces — no restrictions on where you can leave your secret messages.
Details and Performance
Each pen combines two functions in one sleek body: UV-reactive ink at one end and an instant-decoding ultraviolet LED at the other. The specialised ink formula adheres to paper and card without leaving visible traces, while the UV LED makes the text appear in less than a second — no accessories or waiting required. Recommended for children aged 3 and over with adult supervision, this set is a natural choice for STEM activities, detective-themed roleplay, or unique, creative gifts.
| Parameter | Value / Detail |
|---|---|
| Set contents | 5 invisible ink pens |
| Pen length | 13 cm |
| Pen diameter | 1.8 cm |
| Ink type | Invisible in normal light, UV-reactive |
| Integrated light source | Ultraviolet (UV) LED |
| Batteries included | Yes, pre-installed in each pen |
| Compatible surfaces | Paper, card, light-coloured smooth surfaces |
| Recommended age | 3+ years (with adult supervision) |
| Recommended uses | Secret messages, detective games, themed parties, STEM activities, creative gifts |
Package Contents
- 5 x invisible ink pens with integrated UV LED
- Pre-installed batteries in each pen (included)
Frequently Asked Questions
Is the ink safe for children?
Yes, the formula is non-toxic and safe for recreational activities. For younger children, we recommend use under adult supervision.
Which surfaces does it work best on?
Results are clearest on white paper and card. On light-coloured and smooth surfaces, the text becomes visible immediately under UV light.
Can the batteries be replaced when they run out?
Yes. Once depleted, the button-cell batteries can be replaced with standard ones available at most retailers.
Does the ink fade over time or stay on the paper?
It remains on the surface — this is not temporary ink. Messages can be read at any time using the UV LED, but they will remain invisible in normal light.
Is the UV light dangerous?
The LED emits a low intensity that is safe for recreational use. However, avoid pointing the light directly into the eyes, especially with young children.
Photo Gallery
Ba***** ***n*** –
Great for party favors. All 5 pens worked perfectly and the kids had a blast.