KF3081

These are great! We used them to label the back of each wedding RSVP with a number so we could figure out who it was from - in case of hard to read lettering and/or they don’t say who it is. Once the ink dries I couldn’t even see it! And with the light provided it was easy to see! Highly recommend if you want an invisible ink pen that’s at a great price!!

Fantastic colors and pens. The keychain lights are a little disappointing, though. But, those aren't why I bought these.

I wanted to mark some game pieces to make it easier to find the matching cards, but not ruin the look of the pieces and these pens were perfect. The yellow was a bit weak on the wood, so I just used the pink and blue. The blue had a slightly thicker point and more even coverage, but the thinner pink proved useful for the longer names. On paper, the blue was still the brightest in the black light, but it was visible in regular light. The yellow looks great at first but then fades into the same color as the blue under black light. After ~5 min of drying, you could still see the blue writing, even though the others fully disappeared. These could be fun for other things if you didn’t need the three colors… As a side note, at work, our props department uses something similar to these to mark liquid levels or placement of specific items that actors use, so we can make sure we start in the same place when we do another take. That said, if you need to make sure your roommates or kids aren’t getting into something they shouldn’t, you can mark it with these! Would buy again.

Super cute and fun stocking stuffer for the kids for Christmas. They esp love using the little light for many things besides just seeing their writing. Pens work well and dry quickly and they liked the bright colors.

They are not nearly as bright as as i thought they should be be

Does it's purpose and solid

These are so much better than the pens with the big light on the end of them. They are very inconspicuous and they write in each represented color. Lots of fun for kids and adults. The lights can hang on a keychain. They are exactly like the lights that show blue light filter on glasses. It’s difficult to see the blue a yellow through my camera phone but believe me they are true to color.

These pins are not truly invisible you can see the ink on the surface of the items. It looks like a black permanent marker. One of the flashlights doesn't work. Only positive is the light makes it luminate neon. Would not purchase if look for invisibility.