UV Reactive Security Marker Fine Invisible ink Spy Pen,7820

by LED Wholesalers

Product Details

• Shipping Weight: 2.1 ounces (View shipping rates and policies)
• ASIN: B001U0IBPA
• Average Customer Review: 4.4 out of 5 stars  See all reviews (5 customer reviews)
• Amazon Best Sellers Rank: #4,389 in Office Products (See Top 100 in Office Products)
• Date first available at Amazon.com: February 25, 2009

Product Description

Product Information Use this fine invisible ultraviolet (UV) marker pen to mark and identify all your valuable, electronics, important documents, artwork or virtually anything with this UV marker which is invisible under normal lighting, then shine a UV light on the item to reveal your marking. Ink is permanent and water-resistant on most surfaces.

Customer Reviews

Most Helpful Customer Reviews

5 of 5 people found the following review helpful:

4.0 out of 5 stars Lots of testing for this review, April 28, 2011

By 

Alan - See all my reviews

Amazon Verified Purchase

This review is from: UV Reactive Security Marker Fine Invisible ink Spy Pen,7820 (Office Product)

As with other reviews of this product, the pen(s)do not come in the card packaging as shows in the photo, but rather as individual unpackaged pens. No big deal.
First impression: nice fine point, finer than another UV ink pen I have already.
First test: On white printer paper. Let dry. Under incandescent lighting indoors, invisible. However on inspection under natural overcast daylight, I see a faint yellow hint of the ink.
The other pen I have, another manufacture, also can have this issue of a faint hint under natural light on some surfaces.
Second test: run the piece of paper with the ink underwater to see if it's in fact permanent. After drying it our the ink does not run or fade. It's permanent as far as I'm concerned.
Third test: Marking a black painted metal surface. Faint hint under natural lighting.
Forth test: Marking a medium gray painted surface (house paint): Faint hint under natural lighting.
Fifth test: Marking on galvanized metal. Faint hint under natural lighting.
Sixth test: Marked on several different indoor surfaces, painted wall, clear coated wood and yellow plastic. It's invisible under indoor lighting.

On all surfaces the UV ink shows up with an inexpensive UV light.

Thought: Natural light (the sun) does have UV light in it and that could be why there is a faint hint.

Overall, not worst than the other pens I have, finer tip is a plus and it is permanent.

4 of 4 people found the following review helpful:

5.0 out of 5 stars Practical and Fun, September 5, 2010

By 

Ken & Deb - See all my reviews

Amazon Verified Purchase

This review is from: UV Reactive Security Marker Fine Invisible ink Spy Pen,7820 (Office Product)

Our experience with this pen and vendor were similar. We bought the pen along with a UV flashlight 395 nM 51 UV Ultraviolet LED flashlight Blacklight 3 AA, 7202UV395 and the pen arrived in a padded envelope without any other materials. It works fine and, once dry, the ink isn't easily visible on most materials (sometimes on dark-colored items you can see a trace of it if you hold the item at an angle in bright sunlight, etc.) but it glows very strongly under UV light.

The "fun" part is marking items with pictures or words and then watching people's surprise when they see it show up under the UV light. Once at a Del Sol (color-changing T-shirts and other clothing, etc.) store, I asked the clerk for a gold $1 coin and then drew a smiley face on it. When I held it near one of the UV lights they use to demonstrate the product, the image glowed brightly as expected. You can mark on almost anything and the writing remains invisible until the UV light hits it. Of course, I've used it to write names, etc. on items for proof of ownership purposes, but it's fun to think of new ways to introduce people to the UV technology.

3 of 3 people found the following review helpful:

4.0 out of 5 stars Great UV pen, March 14, 2010

By 

Brendan Ngo (California, USA) - See all my reviews

Amazon Verified Purchase

This review is from: UV Reactive Security Marker Fine Invisible ink Spy Pen,7820 (Office Product)

The UV pen works great, especially under a UV/Black light. The UV pen was delivered faster than I've expected, although only the UV pen itself was shipped, nothing else, not even the original package its suppose to come in like the photo. But it works fine and looks new.