Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue

Best black light invisible marker I’ve bought shows up so clean in the black light. Easy to use dried quickly very high-quality. The one I got glows blue in black light. Very good if you want to write an invisible note, secret letter or even write in your diary/journal.

Drew all over my walls in my house and my girlfriend loves it. Very bright and bold lighting. The tip started to fade after I was done drawing but I put the pen down for a while and it came back with full color!

Works ok, except on bright white paper, the brighteners in the paper (or other materials) mask the glow from this blue pen, use red on bright white paper, or other media.

Invisible and works great with black lights. The longer you let it dry the less visible it is. After a few days it is quite hard to see it. Unless you have a black light. The tips are easy for kids to smash. That’s the only thing I don’t like about them. price could be a little lower.

I’ve tried a lot of these kinds of markers, and this is the only one that lasts.

Great value for the price. Exactly what I needed and doesn’t look like it will dry out too quickly. Works great on all types of materials and is invisible as advertised! Would definitely recommend!

Doesn't glow as well as the pink, but works well none the less and is invisible :)

The most fun was drawing clown faces on my grandchildren and taking the funniest pictures when they were all lit up. As soon as I turned the light off, they looked perfectly normal and clean. Very very cool - the kids, and I, were delighted!!

Worked exactly as advertised!

Great product wish they made it in a thin tip but even when it is a wide bullet tip you still can;t really see the ink unless you know to look for it.

Definitely worth having to personalise valuable items at home incase of theft.

A bit pricey, but is an excellent pen that is so much better than the children’s pens being sold. This is a true professional pen that will not only last longer, but will provide a high-quality UV marker.

De qualité, répond à mes attentes