Customer Reviews

I've been a big fan of the Hi-Tec C (0.4mm) pens ever since I laid my hands on them. Compared to the Hi-Tec C pens, however, the Uni-ball (DX) UM-151 (0.38mm) is much thinner compared to the Hi-Tec C. I personally love how smooth these pens can write without any scratch noise. In addition, IT'S WATERPROOF! The Hi-Tec C pens are not waterproof (one drop of water can mess up the ink on paper).

I gave a Hi Tec C pen for my boyfriend last year and he broke the tip of it. I bought these pens this year for him and he said he absolutely loved it (better than the Hi-Tec C).

I love UM-151. Just one thing I really don't understand, though. These guys are $2.5 each, and if my math is correct, if I buy 8 it should be $20. Now this set is actually $1 more expensive!! Shouldn't it be the same price, if not cheaper?

I use these to draw what I see with the microscope (histology). These colors are good for most of the stains I use, but replace the pink with "pure pink" to get a better set.

This ink does not run, even if I spill alcohol or water on a drawing - which happens a lot more often than it should.

I highly recommend these for laboratory use.

Darn, I was just about to order these, and they're sold out. Please restock! ^_^ I LOVE the couple of DX UM-151s that I have - now I need them in more colors!

i really like the colour and the ink of the pens, but i find that it is easily ruin ( i don't know how to say this sorr for my bad english. T^T) because of its thinness. for instance if someone drops them, the ink won't be able to come out properly, other than that it's a really good pen to use!

i just got these pens and I love them! The package said they come in certain colors so i order 2 other colors, but they ended up being the same as in the set! I could have gotten more colors! they never leak and write really smooth.

SMOOTHEST PEN EVER!!

One of my top favourite..and it never leaks. If you want smooth writing get this over hi-tec-c.

I think I'm in love with this pen. I'm a huge fan of the .25mm Slicci, and this pen--this color in particular--gives it a run for its money. Ink flow is smooth, pen is well-balanced, and the color is phenomenal. You know how a lot of purple pens end up looking kind of fuchsia-ish? This pen, on the other hand, is a true, deep, royal purple. I adore it. I also got the Black, Bordeaux Black, and Brown Black, and I love them all for the same reasons (although the lavender black is my favorite color). There is a noticeable difference between this .38mm line and the Slicci's .25mm line, so I won't be using this one for extreme detail work, but there's nothing wrong with having different instruments for different purposes. Excellent pen!

I love this pen. It writes smoothly, and the ink is a deep, pine green that looks great no matter where I've used the pen. The color is subtle (it doesn't scream "I'm GREEN!") but still looks unique.

I find the 0.38 mm version to be a sweet spot of fine, concise lines and ease of writing. The blue black ink is a fantastic alternative to the usual black but still professional in appearance to be used in a business setting.

This is a very bright pink! Almost like a hot pink. I like the 0.28 Uni pens. I think these are quickly becoming one of my favorites.

This is the sweet spot. The .38mm is not too thing or too bold. I found .4 to be too thick and .3 to be too thin. 0.38mm seems to be the sweet spot.

Also, as far as the color, its just the right amount of blue where it doesn't hurt your eyes but its enough blue to distinquish it from black.

Its the best!

I LOVE this pen, and all the DX UM-151s. I teach at the U of Utah, and this is the pen I use to grade all of my student's papers. The tip is fine enough that I can make little corrections in the margins and between lines; the "Bordeaux Black" color is red enough to seem like it's chastising my students for their silly mistakes, but not so red that they feel violated (turns out that bright red pens have a negative effect on students); and the smoothness is unlike any other pen with a tip this fine. The "blotchiness" that another reviewer mentioned is, for me, more like a fountain pen's "flair" once you get more used to it (perfect for writing kanji). Finally, one of the greatest features about this gel pen compared to every other gel pen I've used is the speed at which it dries--it's a smooth, fine gel ink that won't smudge. Awesome, awesome pen. Also great for writing in the margins of books.

This pen has a stronger tip and better ink than others. I've tried the Hybrid Technica and Hi-Tec-C pens and I disliked how fragile their tips were, you feel like you're going to break it if you write too fast. In addition, the ink from this pen dries significantly faster than the others', which is really nice if you're going to be writing on a semi-glossy surface like taking notes in a textbook, writing a card, or writing left-handed. After I tried this pen, I never bothered trying another manufacturer's again.

this pen is a disappointment. the ink flow is great but it's so scratchy. i can't bear to use it, almost feels like nails across a blackboard. i've used uniball signo bit 0.18 and that was not scratchy at all so I have trouble blaming the scratchiness on the pen being 0.28. i do find the tip very durable and the barrel size is very comfortable.

it would have definitely been my go to pen for taking important class notes since it's waterproof and coffee/water spills are way too a frequent occurrence on my desk but the scratchiness of it is unbearable.

this color isn't as pretty as in the picture; it's almost maraschino cherry-colored. i'm kinda disappointed by the ink flow, especially b/c it's .28, sometimes i have to write over what i've written a couple times for it to show up. definitely wish i'd gone with a .38 of this pen in a different pink.

I write incredibly small and the DX in Brown Black (0.38 and 0.28) is my signature pen. I've tried Hi Tec Cs (in 0.25, 0.3 and 0.4), Pentel Sliccis (in 0.25 and 0.3), and Zebra Sarasas (0.4). Each is a very different writing experience and each have their strengths. For every day writing, though, my heart belongs to Signo DX.

The tip is very strong; some say it's scratchy, but that makes me think of an unpleasant sensation. Instead, I'd say it definitely feels firm and precise (but not grating). Unlike Hi Tec Cs, they don't need to be "primed" by scribbling a bunch before the ink flows evenly. The brown-black ink is gorgeous; it's dark enough that it doesn't look gimmicky or childish (though I love those as well :D) but just brown enough that it looks subtly different and has a rich warmth to it.

I want to disagree with the reviewer that says this color is not dark enough to use for business. I use this pen anywhere I would use a black, or blue-black pen and am quite happy with it. It is especially nice to use if there are several people writing on the same papers, and you can identify your own writing by color. It is not quite as distinctive as blue-black in my opinion, but just subtle enough that few people will notice it unless they know to look for it.

Also, I'd like to say that I find the 0.28 and 0.38 pens last much longer than the 0.5 size pens. It's quite noticeable to me. I prefer the 0.38 size overall. The 0.28 can be hard to read for some people depending on the lights or their eyesight, and I avoid the 0.5 just because it runs the ink out too fast.

Great pen!

I'm glad I gave these 0.28mm pens a try. They are an everyday use pen for me, I bought all the colors in 0.28 & 0.38 mm.
Hint to like-minded pen collectors, this violet color is the only one that must be purchased seperately, because it is not included in any of the color sets.

Love this pen, it is quickly becoming my favorite. Writes rather fluidly for a 0.38 mm point. In fact, I am extremely impressed with how small I am able to write, without skipping or any problem whatsoever. It reminds me of fine writing instruments I used as a draftsperson many years ago. The green-black ink is a wonderful color, more of a pine green. I love writing with it so much that I plan to order more in different colors to use for both writing & drawing. At this price I can afford to indulge. Thanks JetPens.

This pen is fantastic. Due to a previous person's review stating that the pen was too scratchy I bought this .28 size and the .38 size. While the pen does have a scratchy quality due to the small size I found that I acually liked the drag on the paper and that my handwriting was far more legible.
The black - blue color ink is a great mix of the two colors, that also looks unique.
The pen ink lasted a lot longer than I had expected, and that was with daily all day use. I will definitely be buying this pen again.

A marvelous everyday pen. This pen is my favorite. I have been ordering other pens to try them out and I always end up coming back to this one. I have gone through 11 of these pens so far and plan to continue using them. Some may find the line too thin, but I like it. The rubber grip seems to wear out and get a bit loose over longer periods of time (after replacing the inkwell once or twice). The cap also becomes a touch loose over a similar time period. I always put two or three of these on any Jetpens order I make. At the risk of making these pens be out of stock more frequently, I would recommend this pen to anyone looking for a hardworking, high quality, everyday pen.

The best everyday pen sold by JetPens. Can be used for writing and for drawing. Waterproof. Mitsubishi (Uni Ball) makes fantastic products. My favorite brand.

Awesome awesome awesome! I bought these because of the fine tip, and was concerned about spending a lot of money on refills (reviews have said that the ink runs out really fast). It does run out, but I have gotten through an entire semester on two ink cartridges (and I take a LOT of notes). This is my go-to pen.

Love the way this pen writes. Color is a lot like the Style Fit's golden yellow color, with just a slight bit more orange. Very pretty light orange with yellow color. Great for side notes or highlighting.