kenable UV Ultra Violet Permanent Security Marker Crime Prevention Pen

This felt tip pen is exactly as described and then some. The ink is nearly completely invisible to the naked eye. Unless someone is specifically looking for the writing with this pen they would never see it. I used it to make inconspicuous marks on some small property like little tools and such without ruining the look of items. With a small UV LED or other UV source I am able to see the words or writing vividly. I am quite impressed with the permanent ink, I was concerned I wouldn’t be able to remove it if I wanted to give away an item I had written my name on, I had to use rubbing alcohol a few times to finally get it off, but it wasn’t easy and took multiple passes and even then wasn’t fully gone. I am very impressed with the permanent ink portion of this pen and ordered 5 more this evening due to the high quality and the outstanding performance.

Has worked for every material I've written on (variety of plastics and metals), and is visible under blacklight. Unless you know where to look, this would be very difficult to see a-la-natural. After drying, I can't rub it off with just my finger. I keep this is a ziplock sandwich bag, just because a previous blacklight pen (not this brand) dried out after a few years. Not sure if this is necessary at all for this one, but if is still functional after a few months.

It works as advertised, but the base is somewhat glossy. Therefore, if ordinary light shines on the writing at the wrong angle, the writing can still be clearly seem by the light reflecting off of it.

Very nice UV marker pen. Writes very fine lines, so getting small lettering on an object is easy. Nearly invisible without a UV light source. Ink is also very durable. Using my fingernail, I tried scratching it off a metal object to no avail. I'll be ordering a couple more.

Great marker, shows up well under black light and so far not viewable with out black light, lasts long time no fading yet, and great price compared to others

Even w/o any brand printing on the marker this marker is one of the best invisible ink markers you can buy and the ink doesn’t dry out like others do.

works as advertized -- it is UV-reactive and it isn't easy -- but not impossible -- to see under normal light because it's somewhat glossy. Good to use for product identification/return fraud prevention. It can be seen with the 395nm UV lights.

Works as advertised but a sharpie highlighter is better and cheaper.

fonctionne très bien !

writes on almost all surfaces with small tip

Awesome product,I'll be back,I've purchased a few things from this seller and every time has been a 5 star rating which is difficult for me to give out

Funciona según lo esperado.

Al abrirlo para su primer uso, un mes despues de recibirlo, estaba completamente seco. Y no, no es que sea asi por ser ultravioleta, estaba seco, como cualquier rotulador seco.El vendedor me ha ofrecido reemplazarlo. Cuando me llegue os cuento que tal...