Invisible Ink Pen

Pros:

- Easy to use, even 3 years old child know how to use this.
- Price is cheap
- Can use as dark light
- Hardly can find this item in the market. If you can find it, I don't think it will be that cheap

Cons:

- Not much Cons I can say.
- Does not know how to replace the battery
- Battery run out quite fast
- Fragile. I have one, once drop on floor does not work properly

Other Thoughts:

I have bought this more than 10 already! I normally give this to my friends as a gift.

Bottomline:

Buy one and write secret message to your girlfriend~

Pros:

The pen is cute, and its something people will be amused at and will will make you look cool with your friends, at least for a little while haha. The kids will love it and will keep them entertained. It can also be used to draw/write stuff and then if you own a black light you will see the stuff when you turn off the lights. Also the price is great, I got a couple to give to my kids friends in birthdays etc.

Cons:

Its not really useful, unless you have a black light in your room and then you can write stuff with the pen that will be only seen at night.

Other Thoughts:

Not very useful but very entertaining and cute.

Bottomline:

Very nice buy.

Pros:

Cheap price! and great stuff to mess around with :) check for fake dollas and just have fun - especially if you have little kids.
you can play with it with your girlfriend\wife. lots of ideas comes from this little pen

Cons:

No cons.
low price and great material makes it flawless!
i didnt like the package- but its not a con cause it supposed to be childish :)

Other Thoughts:

I think everyone should have one of these at home :P

Bottomline:

Cheap and 5\5
I really like it - i use it sometimes, works great. i recommend it.

Pros:

The pen looks attractive. My daughter liked it. It is easy to use. Children are amused.

Cons:

I can also use it for 'secret signs'. But the result is not excellent, because there are some visible marks due to the pressure while writing. So the invisible effect does not fully works out.
Besides, the build quality is average. The material does not look durable.

Other Thoughts:

Excellent as a toy for children playins spies.
Not so good for 'professional' usage.

Bottomline:

The price is low, so the item is worth it. The pen is very good as a small gift for children aged 7 - 12 years old. But not as the gift for elder people and teenagers, because the package is very cheap and childish.

Pros:

They work!!
Cheap
Bulk rate shipping
Cheap
Kids love them!!
I have purchased more than 50 of these pens and each time I have been very pleased with the quality.

Cons:

Battery is really hard to replace.
Can dry our if left uncovered.
I. An not complain about a pen that is less than a dollar. Common sense will tel, you that any of the cons can be overcame by buying a new pen.

Other Thoughts:

Best deal on deal extreme, you can not find these anywhere. Everyone that uses them, loves them.
Excellent deal.

Bottomline:

Buy them!
With bulk rate shipping, you can get 10 for less than a dollar a unit. Well worth your time.

Pros:

Pretty cool pen to have if you're still in school and pass notes that you don't want the teacher to read
The pen is only like 2 bucks

Cons:

Pen cap could be a bit smaller
Pen tip is kind of hard, it should be more like felt markers.
Tip of the pen scratched my skin when I wrote on my arm
Light isn't that strong
I dropped it by accident and the light got even more dim :(

Other Thoughts:

Really invisible, you can check how much ink you've got left by shining the light at the pen
Mainly for girls, as it only comes in purple
If you're going to use this might as well buy two
One for you and one for the other person to pass notes with

Bottomline:

It's less than 3 bucks just get it. If you don't like it, how cares it was like 2 bucks

Pros:

* Works really well
*Very cheap - amazing price
* The batteries will work for link time - few month without any problem.
*The ink is really invisible - you can't see it. other cheap products have cheap ink that you can see even with out the pen lol.
* The UV light is strong - really shows the invisible ink.
* It looks and feels nice.
*Lightweight - very important cause you can carry it anywhere anytime.

Cons:

no cons.. i think it's a really great product - you should buy it. the price is great and the shipping is pretty fast ( and it's also 100% free so it's really great for you )

Bottomline:

I really like it - i use it sometimes, works great. i recommend it.

Pros:

Cheap,works well,+very bright for the size,+the big batteries provide longer runtime,+good button switch,+good hard plastic material,+you have invisible ink and UV led in one pen,+It's very comfortably,+The ink really glows when lighting on it;+Lightweight;+Nice looking;

Cons:

no

Other Thoughts:

Can be used for marking paper or other thing for some security purposes.Can be used for some games.
And more important- it's perfect to charge glow in the dark tailcap buttons on the flashlights.You can charge any other glow in the dark objects.It's great.

Bottomline:

Good price,Very useful,so buy for you,buy gift for your friends!

Pros:

Price.
Ink really works.
Overall size.

Cons:

Head size.
Construction material.
Color.

Other Thoughts:

Really useful when leaving messages. In this case you should buy at least two.
Well, one for you and another for your partner.... or someone who you'll leave a message. Anyway...
I think there should be other color options like black, or white. Purple definetely is not my preferred color.
The head should be smaller. The battery life is holding until now.

Bottomline:

You should buy it. At least two.
Worth the price.

Pros:

- Cheap, very, very cheap
- UV reactive means, you can use it anywhere where UV lights are used.. hehe
- Can be used for marking different things for own discretion

Cons:

- The ink can bee seen on some surfaces
- The cap and the plastic is umm... a little flimsy
- The can is not airtight, so that means:
- Ink dries by the time

Other Thoughts:

Umm... any ideas what you can do with it? ..
It's best use is for fun or some low quantity marking, or just testing ideas. Else I would buy more quality marker.
or as a toy for a while..
Or.. Fun for a party.. drawing in a club with UV lightning? Cool.

Bottomline:

Few dollars for a interesting thing to be creative about or around. More than a toy..

Pros:

It works.
You cand do some writing.
You can use any UV light to reveal what was written with this.

Cons:

With sharp eye you can see the ink without UW light. But this could be expected. But on the common view it's still unnoticeable.

Other Thoughts:

Good for fun mainly. I thought many other uses but never realised even one of them. Many times I thought about writing a crib with this, but on the first place I'm not crib person so I never did it and test it, but you could...

Bottomline:

The price is very fair, it could be nice gift for kids, you can use it variously... so buy one... at least for fun.

Pros:

Very, very cheap.
Pretty purple half-transparent color.
Batteries included so you don't have to worry - just remove insulating paper and start using.
Good quality, no cons here.
Can check bank notes well.
Light is quite strong to operate in a daylight or in the office.

Cons:

Strange anime-styled packaging. Good for child, too funny for an adult. But you can throw it away and present a bare pen as is.

Other Thoughts:

Perfect gift for a teacher.
Great toy for a children.
Fun for adults.

Bottomline:

The best thing to buy. Ordered 5. Ordered 5 more. Everyone who see it, like it.

Pros:

+ Very cheap
+ Very fun
+ Nice lookings
+ Works with other UV-lights

Cons:

- You can actually see the inc on some surfaces
- Not the best build quality
- The "ink" dries in the pen after a while.

Other Thoughts:

Would be really nice if the "ink" lasted longer in the pen.

Bottomline:

A fun little thing that will impress some of your friends. Write some fun stuff on the physics teachers writing board, then laugh when the teacher starts their UV-lamp!
It isn't the best quality and sure it will stop working pretty fast but come on! For this price its toataly worth it!

Pros:

- cheap, these costs twice as much at shops
- came well packaged
- great gift for kids and adults alike
- great way to write down secrets, private information
- comes with uv light and batteries
- Replaceable batteries
- uses AG3 cells that can be found cheap here
-

Cons:

Not possible to replace the ink tube

Other Thoughts:

For this price, get it. Some day you would find it extremely useful and fun. However it should not be used to cheat In tests.

Bottomline:

An affordable invisible ink pen, great to use as gifts, secret note taking. Kids would definitely enjoy this pen so would adults.

Pros:

Writes text invisibly!
Pen has a UV LED mounted with it, for seeing the text!

Cons:

None!
Perhaps it'll dry out soon, perhaps it might lose it's flare after a while, perhaps the ink is not permanent, but hey!
It's only $3, and you had fun in the mean time!

Other Thoughts:

Ever wanted to write secret messages to your lover?
Now you can, and only she will know!
Write your secret message in between the lines of a regular business text, or on the back of a business card!
Also kids will love this pen! They have a great imagination! Buy it for them!
Once ink dries it's impossible to notice with the naked eye, unless you have a UV light somewhere.

Bottomline:

Buy it, even if you don't need it!
It's only 3 bucks, and even if it will bring a smile on your, or someone you know's face,it'll be well worth the invested $3!

Pros:

Works as they should
Boys, girls men and women all like them.
You can write secret messages anywhere.
You can use the light to see if your pets have left you any suprises in your house.
You can write on the walls and you can't see it without the light. (Kids ask your parents first).
It encourages kids to write and draw. They're learning by playing.

Cons:

The only con I can think of is that if you only have one you will find everyone wanting to share with you.

Other Thoughts:

I found that my husband wrote "The butler did it" on the wall in the rare event that a CSI-like team ever comes to the house. Just thought it would be fun. You can't see it without the pen which is good.

Bottomline:

I got alot of these with the bulkbuy option and gave them to my kids and their friends. It kept them entertained for a whole rainy holiday day. Which is great.
Also they are cheaper than many normal pens.

Pros:

Does exactly what it is supposed to do.
Don't have to buy batteries or anything is already to go when you get it.
Good fun to write secret messages to your loved one.
Or to play with your child.

Cons:

I dont have any cons aside from that horrible plastic packaging that you need scissors to open :P

Other Thoughts:

Overall I think this is a great product, and you should consider buying this for the entertainment value.
I plan on using this to leave secret messages to my spouse for him to read in the mornings :)

Bottomline:

Bottomline!!!! go buy one now! you clicked this page because you thought it was a neat item, get one! :)

Pros:

This pen, in Brazil, costs R$ 15 ($ 7 more or less ) and on DealExtreme.com, only $ 1.39 ( R$ 2 )! this thing is cool, its legitimately writes invisibly until the light is flashed on it! cool gadget for writing notes and secret messages! very compact and very entertaining! its a nice gift for kids. They really like to write invisible messages to Their friends. Its a small gift That makes the child very happy! You can write love messages to your girlfriend (just as i did) and write down That formula you can not remember for an exam (hehehe)! Good to write passwords, and when you forget them, only you can see them! I recommend you buy two, one for you and one for your best friend or girlfriend ( or boyfriend ), so you can exchange secret messages! Works great, batteries were fine and took a long time to wear out, and the ink lasted a long time. You can use the UV light to check money, use the UV light as a flashlight, etc...

Cons:

No cons !! This pen is P-E-R-F-E-C-T !!!

Bottomline:

I recommend !!

Pros:

Very funny and nice pen for little children. You can't find this kind of pen anywhere else this price, everywhere pen's like this price is about 5-10 euros. You can so easily just write, and reveal your text with this pen!

Cons:

Batteries what comes with this pen should be a little better, because this pen worked only 1 week with those batteries.

Bottomline:

If you are trying to buy this kind of pen somewhere, buy this, you can't get it any cheaper than this anywhere.
When you get this pen, just write something with the pen, and then reveal your text by pushing button, and aiming the light to the paper where the invisible text is.

Pros:

Surprisingly, the biggest pro is that it works as intended! I had my doubts when seeing it here online, but it works also in real life. You can write secret messages, out of “passion” or just for fun. The written line is thick enough and readable also without pressing the pen too much while writing. Also, the fact the light to make the written lines visible/readable is directly with the pen, makes this item easy to be used.

Cons:

I did not find any. Could it be offered in packs – but not really a con, just a suggestion.

Other Thoughts:

Hard to make any suggestion here, it is perfect almost in every aspect. But if I should mention at least one thing, the price could be a little bit lower maybe.

Bottomline:

If you can imagine use for it, I do recommend buying it – it works, and is fun. For example, I intend to use it for Christmas gift name labels (and use a real pen only on Christmas Eve).

Pros:

The pen works just as told it is very funny to use i wrote on my friends arm and he couldnt read it it was funny to watch him try to read it with other lights but it didnt show:) The lights battery didnt die for a long time and was very usefull for notes written weeks before, they were still there.

Cons:

no cons at all the product was perfect

Other Thoughts:

the pen was just awesome you can write notes and they will still be there even like a couple weeks later all you have to do is shine the light on it.

Bottomline:

Buy this product it is very amusing it is great

Pros:

This item is one off DX "Best Buy" options.
First time i ordered the pen i just ordered one to check if it was worth it, and it was.
Now i always Bulk order the pens for half price. This is a really good product to use for checking money with the UV-light.

Cons:

No Cons!!!!
When i bulk order this item i pay only half the price for the pens.

Other Thoughts:

My friend who run a casino table suspected that an enploye stole bills from the cash register. So i gave him a pen and he marked all the bills "invisibly" and after the shift he noticed missing amount off money.
and found the "marked" bills in the employees pocket.

Bottomline:

This is a funny and usable product fot anyone with a little bit off imagination :-)

Pros:

- Is soo cheap
- you can write a secret message to your frends and girlfrends :)
- you can cheat in school heh ;)
- lovely design
- good UV light

Cons:

In my opinion is that this item has no bad qualities for this money...

Other Thoughts:

This thing is soo cheap. If i compare this price whit this item in my country is 5x cheapier. I recommend this to all people who loves jokes :) hehe and is soo funny when you put UV light to other person or things and come out soo nice colors of them :P

Bottomline:

This was my first order and i decide to order more stuffs.
Tnx DealExtreme :)

Pros:

- this thing is cool, its legitimately writes invisibly until the light is flashed on it
- cool gadget for writing secret notes and messages
- extremely cheap
- good for a stocking stuffer
- very compact and very entertaining
- comes with a lot of ink in it and lasts a while
- I will be buying more soon
- good for kids who are in to spy/mystery stuff

Cons:

- no cons, i thought it would run out of ink quickly but ive had it over a month and it still works great

Other Thoughts:

if you're in to cool little nick nacks then this is perfect for you, I think its a lot of fun

Bottomline:

its a dollar, and you will have endless fun with it, there is no downside. even if you dont end up liking it, give it to someone else, it only costs a dollar so its worth trying.

Pros:

its a nice gift for kids. They really like to write invisible messages to their friends. Its a small gift that makes a child happy.

Cons:

I ordered a few and in one the lamp was not working, so that one is not very useful as you can not see the messages...
In another one the ink started to get dry after two month, so its not lasting very long

Other Thoughts:

If you want to use it to exchange messages between people everyone needs one to be able to read the messages.

Bottomline:

Its a nice gift for kids but does not last very long

Pros:

- The ink is really invisible, you can't see it on white sheets.
- You can write love messages to your girlfriend (as i just did) and write down that formula you can't remember for an exam.
- It is not expensive.

Cons:

- I bought 3, and all came purple...
- Ink doesn't live too much...

Other Thoughts:

As I said, you can play with your girlfriend, writing down some messages that just her could read...
And so on... as your imagination wishes...

Bottomline:

It's kind useless, but it worths the good times you will have with it. Cheap....

Pros:

-Name your Things (Invisible Tags).
-Secret Notes.
-Cheap Invisible Ink pen.
-UV Light.
-Let's play "secret agent-man" :D

Cons:

- On Mirror ,Glass, Fiber, or Metal it is sometime readable or noticable.
- On heavy textured\coarse object, it is hard to read because of the thin lines. Also, mindful about it's tip.

Other Thoughts:

-The lines or tip could be bigger and bolder
-ink refill

Bottomline:

A fun little gadget for you, your kids, family, or as a gift. Should buy more than one, It's cheap and does it job well.

Pros:

Works great, batteries were fine and took a long time to wear out, and the ink lasted a long time. Got them as gifts for my neices and they loved them. perhaps too much >.<

Cons:

A little bit bulky, and I kind of wish it came in a more standard color so when people see it they dont immeadiatly point and go Whats That?

Other Thoughts:

would be nice if you sold this in pairs as well for a slight discount.

Bottomline:

A great idea for a young teen, or for use in the office to leave funny drawings or jokes on standard memos lol Wonder if the folks at DX have been doing that :P

Pros:

- working
- really invisible, I thought you could see it weakly, but on white sheets this is absolutly invisible.
- the flashlight is good for every use.
- cheap.

Cons:

- the purple color is the worst, really embarrasing to use it if you are a male... I think DX need to think about assorted colors.
- too childish look...
- ink turns out fast.

Other Thoughts:

it's fun to surprise your girlfriend with massages on the walls when its dark, and for any other use you can think of.

Bottomline:

this is not best seller for nothing, this product is very good, working much better than expected, and of course, cheap!...

Pros:

it's work fine
you can write "invisible" messages and then use the light to see it
It can be used to verify money.. and for write or draw on it too :P then the casher see your "art" :P

Cons:

not too much ink
the ink can't be holded on planar surfaces, only on absorvent surfaces

Other Thoughts:

it came with batteries and include a "protection" to keep the bateries alive until arrive.
I still use that protective plastic to prevent the batery discharge.

Bottomline:

good gif
i don't know how safely the ink is, so i don't recommend this for kids too young.