


🔦 Illuminate your secrets with invisible brilliance!
The Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker features a broad tip and double ink capacity for bold, long-lasting invisible markings that glow bright blue under UV blacklight. Safe for skin and fast-drying, it’s perfect for security, creative art, and event applications where secret messages or markings need to shine under blacklight.



















| ASIN | B01F6IPK00 |
| Best Sellers Rank | #19,786 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #319 in Drawing Markers |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,172) |
| Date First Available | May 5, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.352 ounces |
| Item model number | RSMARKB |
| Manufacturer | DIRECTGLOW LLC |
| Product Dimensions | 5.25 x 0.5 x 0.5 inches |
K**E
Fun way to use.
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.
N**H
Good Marker
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!
M**I
Works ok, except on bright white paper
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.
A**O
Best invisible UV markers
The best invisible UV markers I have found to date. Totally invisible until you put a UV light on it and then lights up like a Christmas tree. Good selection of colors… very bright when UV light introduced.
L**S
Fun.
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.
D**R
Best of its kind
I’ve tried a lot of these kinds of markers, and this is the only one that lasts.
T**L
Very little ink
The pen worked great - but one brand new pen didn’t have enough ink for me to finish a very simple project before running out. I wanted to make a very basic line drawing book for my Bible class. I wasn’t coloring in the outlines, just making single figure outlines. It started running out on the third page. By page 4 I had to alter the image to a single word to make it last. I would have needed three, which would be too expensive for one object lesson. Think glowed great under black light, there was just hardly any in the pen compared to a normal marker of the same size - maybe 15%.
S**.
great product -exactly what i needed
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!!
A**E
Worked exactly as advertised!
J**R
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.
I**E
Definitely worth having to personalise valuable items at home incase of theft.
M**.
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.
A**Y
De qualité, répond à mes attentes