DirectGlow Invisible UV Ink Marker Pen with Ultraviolet LED Keychain Blacklight

Works well to mark items I resell. Good theft deterrent.

This little light and UV ink pen worked well for what I needed it for.

I used this on top of an acrylic painting and it worked pretty well. The first picture is the first day (the plant on the bottom right had been done the day before and I redid a couple of the lines, so you can see the older stuff had already faded there) and then the next is two days later. It faded a little but is still visible. I hope it won’t fade more. It could also be because it was on top of paint. ETA: It does fade pretty much completely after several months; I haven't checked exactly how often, but I've typically touched it up once or twice a year. The black light it comes with is very bright, which was surprising for such a small keychain light. I actually wrapped a little bit of cardboard around it so it wouldn’t hurt my eyes when I use it.

I got this for a little project and activity that I wanted to run with my students. I was very pleased with how well this worked for exactly what I needed. Very cool!

This pen and light set work as described. The light is fairly bright and has a handy key chain. The pen works well and the ink, so far, is mostly invisible. On some surfaces you can see the writing, but you really have to look for it. One bad thing is that you have to be very careful with the tip of the pen. You have to put the cap back on the pen very carefully or the fibers on the tip will split. All in all, it is a decent product and I would probably buy another eventually.

Cute glow in the dark markers that actually work! I enjoyed the using the little flashlight that comes with it (especially to be able to see if what we were writing showed up). I tried the marker on a paper project and fabric project—worked great on both. The size of the markers were perfect for the projects I used them on. However if you are planning a bigger project, you may want to order more than 1. Also the marker is fine tip—which was good for my project. Easy to use. Definitely recommend this product!

My daughter has a 80s style slimline phone that is used for a prop for show choir. We think someone took her and put their name on it. (If someone had to do that maybe they couldn’t afford it. I just considered it a donation.) So, I bought a new one and this marker. My daughters name is literally all over this using this marker but you only see it in the one non conspicuous spot that we wrote with this marker. Using the black light you can see her name everywhere but without it you don’t see it. We did write one spot on the phone so know one knows we did this but now if it gets taken we can prove it’s hers! Lol yeah I’m a bit petty but this is great. I will update once competition season comes around to let people know if it’s seen with stage lights.

We purchased the UV pen to secretly code our wedding RSVP cards. We placed numbers on the back that correlated with the guest's number on the spreadsheet. The ink dries completely clear and we were unable to see the numbers until we shined the UV light on them.

The pen quality is good and durable.

I received the pen exactly like the pictures shown, when you write something you can see a little bit, it's like you write by water in a paper, but after few seconds it just disappears and you can't see it at all, even when you turn light off, just you can see in the blue light, which comes in the keychain with the pen, this is just amazing. This's exactly was I was looking for Ps: delivery on time Well packed