edding8280 Securitas UV Marker PK1

I've gotten hooked on escape rooms recently and managed to get my youngest son into them too - so this Christmas, he's asked that we create a home escape room. And, as anyone who has done one before would know, invisible ink can often be a part of these experiences.Knowing that Edding is a really good brand, I opted to buy this pen over cheaper alternatives and I was not disappointed. I've used it on a variety of materials in different colours and it's been fantastic. For those who have said that you can see the ink after writing, well yes you can. Because the ink isn't instantly dry. Give it some time (a few minutes is good, longer is best) and you will not be able to see it - especially on paper.I tested it out on my black faux leather phone case by drawing an asterisk and if I study it really hard in bright light I can just about make out the markings, but it's not immediately obvious at all and if you're not looking specifically for it, you wouldn't see it at all.Under black light, it's clear and bold - the pen writes as well as any other marker and is perfect for my burgeoning escape room. But as a tool for marking your property as a security measure? Also perfect. I'd caution against cheaper random-named brands and stump up a fiver for this one because you will definitely get what you need from it.

Amazon are great 👍

I bought this to go with a UV torch to add security coing to my guns. It works perfectly. My only observation (not criticism) is that the pen nib is quite large, so if you have to put a code in a small space, or your handwriting is big, then think carefully how, what and where you are going to code your valuables. Otherwise, great VFM. BTG

Works well very pleased

Used this to mark some components on a car to prove garage was less than honest. Simply put some small marks onto some components before the vehicle went back into the garage yet again for the same fault. used it in conjunction with a black light torch and took photos beforehand and after its trip to the garage. showed that the claimed work was not done. well worth the money.

Having had out ‘disabled’ bollard stollen we felt we needed to mark anything else left outside, in fact indoors too!

An expensive pen to discreetly mark items that becomes clearly apparent when shining 365nm UV light over it. 395nm UV light will also do the job but 365nm UV light is just better although more dangerous if you misuse it.Tested the pen on shiny/glossy black plastic and (after several weeks) marks never become "invisible" (and remained obvious) under normal light.Also applied on rubber, which absorbed the pen but didnt really provide much benefit using UV light (probably needs multiple layers to remain persistent).Didn't attempt a rub test for durability (yet, will update this review if it proves an issue on black plastic).Overall, it works to mark items that becomes more obvious under UV light, BUT its performance appears to vary depending upon material is it applied to.

Easy to use would highly recommend it