Opticz Blacklight Reactive Invisible Blue Ink All Purpose UV Marker with UV Light

Why did you pick this product vs others?: Get ready to see in the dark. This marker works fabulous. I put it on my finger and I could glow in the dark with my high intensity black light that I also purchased from Amazon I do key impression and I needed a marker to impression my keys and this fit the bill perfectly. I have a YouTube channel and I had to have perfection in my videos and this marked my key, allow me to take files to remove the marker where the scratches are so key impressing with this marker is a must sincerely Mike Walker with door and lock tips. Functionality: Highly recommend functions perfectly Fun to use: I had a blast, specially glowing in the dark Value for money: Little pricey, but worth it because you get a light of black light with it Quality: Commercial quality Brightness: You’ll need sunglasses. It’s that glow-in-the-dark good. Marker quality: Well balanced, and you push the tip to reload the marking material on the tip it retracts

It showed up on time and it works great I'm not sure if it's toxic I tried it on my skin and the design faded a bit through the day of course because of sweating and etc I'm not sure if it's toxic so you'll want to read that it was very bright it's blue and I was going to use it to draw things around my door that no one else could see but me

Good for invisible marking security of personal property. It also includes a penlight!

When it comes to UV markers, I guess it depends what you use it for. For me personally, I was looking for a permanent marker that would write on clear plastic/acrylic. The marker ink beads up and does not allow to be drawn on plastic material so for me, the quality wasn't worth the money. It writes on skin okay if this is your purpose. If for some reason you come across this review and you are looking for UV markers and/or inks then let me know because I test as many as I can so I consider myself an authority on them. The Best Marker I have used so far is the DYKEM UV marker. It writes well on plastic.

I bought this mainly as a way to mark items I sell on eBay, since in the past I've had some buyers return "defective" items that I'm sure were not the original ones I sold. The pen does a great job with discreetly marking items, and the little UV light brilliantly shows the otherwise invisible marks. Now I put a mark on all the items I sell, and prior to shipping I take a photo with the marks illuminated by the UV light. For the money, this pen/light set is great.

Very fun to play with. Invisible under normal light. works great under UV light. Lasts a few days on skin.

As someone else said it does not act like a permanent marker. You can’t write on plastics. It beads up and won’t dry. As a reseller it was bought to prove an item is my original item sold so I wouldn’t get scammed. Also you can see the writing without UV light. The light came on and worked when it arrived but now will not work. Don’t waste your money.

Got this so I could number the back of my wedding invites in case someone didn't write their name down. Worked well!