Customer Reviews

This pen is wonderful. Unlike the black version, the red ink tends to flow out consistently and smoothly, although this does mean that it's not quite as good for "sketching" as the black pen. Its line is much thinner than the red 0.25mm Hi-Tec-C pen, but still smooth. The design is also very nice, and comfortable. I can also highly recommend the orange version of this pen, which has a very pretty ink colour; unfortunately, it's not sold by Jetpens anymore.

The design of the pen is really nice with a splash of color from the cap of the pen to the tail section letting you know which color your using.
Writing with the pen is pretty comfortable because of the molded plastic on the body. Your able to make some really fine lines with this pen as I realized with the rice test. I was able to write clearly on a grain of rice the word 'pens'.
The is some scratching noise when writing with this pen other then that this is a great everyday pen.

Yes, it's a specialized pen, and I don't think it would be comfortable for extensive writing sessions. (I'd suggest the Hi-Tec-C .25mm for that.) But I needed something this fine for annotations and small details in my sketchbooks. This pen has performed beautifully for three years now, on a variety of papers. A big plus for me is that the ink is absolutely waterproof, unlike the Hi-Tec-C's. So I can go over my drawings with watercolors without any fear of the color running.

I bought this pen because I happen to write small. (Less than 1mm text height to put this into perspective.) It definitely does its job very well as a small writing pen. I use this for all my classes, from writing notes between lines and writing entire essays on 6 lines of wide ruled paper.

Pros:
- The thin tip enables you to write thinner, smaller, and also in between lines.
- It also has excellent ink flow so you can write pretty fast with a pen this thin.

Cons:
- It runs out of ink rather quickly. Buy lots of refills if you want this pen to last. In my opinion, it's a price I'm more than willing to pay to write this small.
- If the pen is dropped tip first, it may start to bleed out ink. Not only will that make your line thicker than 0.18mm, it will waste ink as you write.

As a side note, if you lend these pens out to other people, tell them not to write on their hands if they are heavy handed. (They’ll cut themselves.) Also, some students (AP students in particular) may want to buy these pens from you. Either redirect them to this website or buy some extra to give away or sell.

Nice pen to own. .18mm size requires a slower hand to lay down proper ink flow but with patience is well worth the payoff. Unique +

What a pen, my friends, what a pen.... Think on this for a moment, the tip on this pen is, quite possibly, the smallest all metal nib made. You can ink very small, very thin lines with this, in fact, if you go too fast, you leave nothing but an indent in the paper. What makes this pen shine for me is the fact that you can use speed and pressure variations and whatnot to create even smaller and thinner lines than you ever could make with a felt tipped copic that is .05mm. It takes a fast yet gentle and painstakingly careful hand to work with that tiny copic. This uni ball signo bit is a beautiful thing because it costs less, much less, is very sturdy compared to the copic felt tip, and is relatively easily replaced.

Now, that said, the ink goes quick, like a reviewer said, because uni ball is cutting costs and putting less in. I just got it out of the package, and it was half empty. Not only do they put less in, but the space which contains the ink is ludicrously thin as well. The pocket clip has not broken yet, but I put zero trust in it due to the ominous rattlings coming from it. Refills are, actually, quite expensive, just a little less than the full pen itself.

In conclusion, I would only get this for annotation or drawing, and I would, and will, get it again.

For the last few years these have been among my favorite pens and by far are the best of the micro-fine points on the market today. My review of the Uni-ball Signo Bit .18 can be be found at the link below:

http://finepoints.net/2012/08/12/review-uni-ball-signo-18-bit/

I bought this pen along with the Pilot Hi Tec-c .25mm. This is the best pen I have ever used, I bought 10 refills the very next week. As a student I have tons of uses for this pen, not only is it great for taking smooth, crisp notes. If I need to sqeeze something else in, the super fine tip can handle it. Amazing.

Like the last poster I really just bought this for the $25 free shipping. But it's actually pretty good. It's actually a very impressive pen.

This pen is awesome. It is fine point enough you can write tiny, but it is sturdy and comfortable enough to use on a regular basis. I had just gotten it to get to the 25 dollar free shipping, but I am going to get more the next time around. It has a pretty decent grip, isn't tiny like the pentel slicci (though i have small hands i thought i would break that in half). You can have the fine point and the precision without writing with something tiny or overly "pretty."

I bought one of these, along with one of the same model but with the 0.18 mm ball, admittedly out of curiosity - could truly usable pens be made with a point that fine? In my opinion, the answer in both cases is yes. You may need to adjust your writing style to be satisfied with these - a lighter touch, a minimal adjustment to the angle of pen to paper, careful attention to the pressure being applied - but these are noteworthy writing instruments. Thank you, JetPens, for making these available.

Wow - just Wow. Keep in mind that the "0.18" refers to eighteen one-hundredths of a millimeter, and there are about 25.4 millimeters to an inch, and you quickly come to the realization that calling this a "fine point pen" is an understatement of considerable magnitude. The engineering required to make a pen like this is noteworthy, but Uni-ball makes it even better by making a pen that writes clean, unbroken lines of extraordinary thinness. I actually had to look carefully to be sure ink was being deposited on paper. Want to transcribe a textbook onto a Rhodia Bloc No. 10 notepad? Most of a concerto onto one sheet of musical staff paper? Get a couple of these, and some refills, and you'll be ready to go.

It is very useful to own such a extra super mega fine pen, there are many situations when writing with a fine point is required.

I adored these pens...at first. I absolutely love the 0.18 mm size and the lines it produces, but unfortunately the pens would stop working halfway through the ink supply. Every single time. I could not for the life of me figure out how to get the ink flowing again. It didn't matter which color. I only used one up completely out of the set 10 I purchased (8 in the set and 2 additional in black ink).

I'm obsessed with "thin" when it comes to writing. And these pens gave me a good few months before bailing on me. I've never gone back to 0.18 mm sizes as I ended up attributing the ink flow (or lack thereof) to the size.

Before I bought this, only 0.25 mm works for me because of my tiny handwriting......
It works very well:)

The critiques of this pen above are accurate, it's a one-of-a-kind. So fine that it's initially difficult to get acclimated. I'm not impressed with the ink color, intensity, or flow, and won't purchase them again. It's looks like a fine hard pencil on paper, and perhaps in time I might find a need, but unlikely.

This pen is not for everyone, but I love to draw with it. I use it to lay down my first reference lines in my pen and ink portraits. I also use it for very light cross hatched shading. It is as think as a very thin Rapidograph. I prefer to take this out with me sketching than the Rapidograph because if it breaks or is stolen I'm not losing a $15 pen.

I'd like a thicker more comfortable body for this pen. The body and grip area are very thin so I find myself reaching for thicker pens. I keep trying to jam this into other pen bodies, eventually i'll find a thicker one that it fits into.

If you are looking for a pen that will be good fro sketching out in the wild and don't want to take your more expensive rapidograph with you, this is a great pen to do it. The ink is a nice cool black, and different from the other Uniball micro tip pens but like the rest absolutely waterproof when dry. It also dries VERY fast.

I love this pen so much I just bought 3 refills for it.

There is a little period of 'adjustment' when using a pen like this with such a fine point, especially if one is accustomed to pens that produce bolder and thicker lines. The lines are so fine than what most are accustomed to seeing that some people think at first that the pen is not writing when in fact, it is.

Until this pen was introduced to the market, I was left using fine-tip graphic pens to write that had far weaker tips because most ball-point pens did not have a fine enough tip for my writing. The tip of this pen holds up to considerable pressure but if one uses too much and writes extremely fast, there is a chance one will tear some types of paper because of its strong, needle-like tip. There are some in a given batch that write better than others: out of the sixty-or so I have used, I estimate that about three to four of them had a severe problem with ink flow after little use but, so far, all have worked right out of the box. A rare few will only write when held at a certain angle but this is usually after an incident in which the pen had been left cold and unused for a prolonged period of time or used to write on certain kinds of register receipts that bleed any pen dry of ink or white-out. (Ad nauseam, I highly recommend one not writing on white-out of any kind unless you want to render the pen ineffective. I only use the tape variant and every single time I have tried to write on it gingerly and with extreme care using this pen, the white-out changed the ink flow and, in some cases, outright ruined the pen.)

If one does not delve into mad bouts of ham-fisted, hyper-scribbling and is prone to micrographia, this pen is a wonderful recommendation-- I say this after using this pen for nearly seven years now. :-)

This is my favorite pen. I would use an even finer tip pen if I could find one. I use it for journaling because I like the way it looks with a full page of text.

I am very sad to see the blue color go away. I would like to see more colors, not fewer. It would be even better if this company would make this tip available in a more substantial, aesthetically pleasing body or really great to see them make the refill to fit other companies pens.

If everyone would write to the manufacturer maybe this pen will not disappear from the market.

I love the feel of the pen but I am not a fan of black. I am lucky that I bought several of the blue since somebody decided to discontinue the blue pens. I would also prefer a green over the red since 5% of all males are red color-blind making red not a good general choice for marking up documents.

This pen is easy on the hands, and can write in the smallest places. I work where you have to write on these small specimen labels. I can fit the entire name of the specimen on the label. Haven't tried the rice test yet, but I'm sure it'll work. Keep these pens coming.

I agree that it is not perfect but it is far better than anything I can find that even comes close to the detail this is capable of. When it was new I had little trouble with it not flowing consistently. It is about out of ink and it has more dry spells. I am ordering refils. I also have a red pen that I don't use much. The red one is the same age and is almost full. I have yet to have any trouble with the red one.
I use this for writing in between the lines in my Greek Bible, so many words in the new testament are only used once, twice or three times in the entire New Testament I need a crutch.

This pen is a pretty spectacular shade of orange - I also have it in the 0.18mm and 0.7mm points. It really is the perfect shade for underlining and note-taking in books - because it's so easy to see without strain.

Thanks all for posting reviews - entire site full of helpful reviews.
After testing out all I ordered, I found 95% of all the reviews (on products I ordered) to be very correct.
This particular pen, takes my breath away - OMG !!!
I just wouldn't recommend it for everyday use as other reviewer reported.
I can use it every other day!
Truly the sharpest, cleanest ink line possible. Many uses.
AND I tested it with several types of paper, all showed very little change with water applied. Testing water plus abrasion - the paper fibers rolled off before the ink budged. So I'd certainly say it is permanent on paper.

Everything has its use... this pen I've found to be a great substitute for pencil sketching. It works very well when you make lots of short strokes when drawing something, and like a pencil its tone varies considerably. It is indeed "moody" as one of the other reviewers said, but this is another word for "variable tone", which you can use to your advantage if you learn its workings.

The thickness of the ink can vary from very, very light, to a little thicker than the 0.25 Hi-Tec-C.

It's not very good at all for making big, long straight strokes - you want the 0.25 Hi-Tec-C for those.

It's also probably not great as a writing pen, since as I said, it's more for short sketching strokes, and writers tend to write each letter without taking their hand off the page... the other coloured inks of these 0.18mm models come out a lot more readily than the black, and are probably better for writing.