Ultraviolet UV Pen Black Light Invisible Ink

The Ultraviolet UV Invisible Ink Pen uses special ultraviolet reactive ink that allows the writing to only be seen under a black light, and not by the naked eye. The ink is permanent and can be applied to paper, many plastics, wood, metal, etc. The ink may smear when rubbed on some glossy materials such as glass and some plastics.

- Can be used for writing invisible secret messages
- Can also use it to detect counterfeit money
- Built-in black light for illuminating your ultraviolet writing
- Length: 13.0 cm
- Width: 2.0 cm
- Power: 3x AG-10 Batteries (included)