Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle)

Works well! I used this to decorate signage for Halloween. It is easy to use. The ink does absorb light and give it off at night. I would recommend this product for arts and crafts.

Works perfectly! Can't wait to surprise someone with secret messages.Worth every penny. Be sure to buy a cheap portable black light to fully utilize this paint and see what you're doing as you apply it

This product is easy to use and looks great under a black light. I've painted plastic, metal, fabric, paper and resin with minimal issues. I found that painting over fabric is particularly successful, and white is best. I was glad that I read the reviews that indicated that while this works well- it is very thin. On occasion, you do need a few coats to really pop- particularly if the object isn't stark white.This didn't show up on anything I painted in normal light- and is very much invisible until revealed by blacklight. This is exactly the answer to what I was looking for, for personal projects. I would buy again.

This product was purchased for two specific projects. First one, painting a temporary tattoo style death eater mark (Harry Potter) on my forearm. Second one possible make up overlay for Halloween/cosplay. The photos attached are during daytime lit room, and no light pollution dark room. Try not to laugh at my horrible drawings as I really could not see once the ink dried and was just playing around with it.My right leg “Hi” shows The high alcohol content of the ink that allows for super fast dry time, however, the downfall to this is that it is very, very, thin and runny. You will see a lot of bleed through as it absorbed in the cracks in your skin. It is very bright in both bright light, low light, and dark situations when lit with the smallest UV light.UV light shown is a Stylus pen light held about 3-4 feet above the my legs The photos do show a very high saturation light, very bright, but not overly so.My left leg “Hello” shows the durability after three warm and hot water with Dove hand soap, Jurgens, body wash, and lava soap. So once it’s on, it’s gonna stay on. Good thing about this is if you get it, wet and press, clean skin to it, no noticeable ink transfer was found.I did not try a traditional hand stamp or ink pad. I used a talon acrylic fine tip Paintbrush so I cannot speak on how it would work using that.For something simple, fun or quick I would highly recommend this, especially for the price. The 2 ounce bottle I purchased is more than suffice as truly the adage a little goes a very long way with this product. The only reason why I did not give it a full five stars, even though it is invisible during non-UV lighted areas, its major pro is also its highest con. You just can’t wash the stuff off. 🤣

love it

Made mostly of rubbing alcohol, so due to Amazon hazards, they cannot accept this as returnable. I contacted the seller to return because I purchased a blank stamp pad to use for blacklight prints. I noticed immediately that it smelled like rubbing alcohol, tried a few prints which were barely visible, then put the pad aside for a few minutes. When I came back, I resumed stamping, and found the pad was COMPLETELY dry. Mind you, I had SATURATED this pad with about a third of the bottle, and now only a few minutes later after closing the pad, it was dry. I contacted the seller for return since amazon doesn't accept it back directly. They sent me a message saying that they'd accept it by my paying for return shipping due to this being a case of buyer's remorse. Not sure if they understand the meaning of what buyer's remorse is.

Turned white after I put it all over a cup! Definitely not bright enough or black light material

I ran a test patch on a old towel of mine when i first got the ink. So far it has held up to 3 washings and is showing no signs of fading. The ink leaves next to no discoloration (on a teal towel) until the UV light is applied.