while a different wavelength of UV light reacts with the ink to make it disappear again. You use a light pen that you're given when you get your tattoo to activate it and deactivate it ...

We've got the goods: Maleden Invisible Ink Pens. These top-sellers are super popular among ... Plus, revealing what you've jotted down using the cap's built-in UV light is ridiculously satisfying. Get ...