DirectGlow Black Light Luminous Glow Invisible Blue UV Ink Security Kit for Secret Marking Hand Stamping Ultraviolet Detection (Club Kit)

Works as expected but the ink pads take a bunch of ink and they dry up really quick, I’ve only used the stamps about 10 times and I’m over 1/4 bottle of ink out.

I received this today and immediately tried it out. I'm really glad I ordered this. I stamped my hand and you couldn't see it at all. I shined the black light over it and it was as bright and clear as can be! After 8 hrs and about 20 handwashes later, IT IS STILL THERE. 😳 I'm not sure it that's a good thing or a bad thing. 🤔 😂 I plan to use it on paper. Very happy with my purchase. 😊