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Uni-ball Signo UM-151 Gel Pen - 0.38 mm - Black

Uni-ball Signo UM-151 Gel Pen - 0.38 mm - Black

$2.50
In stock and ships within 1 business day.
DescriptionSpecificationsQuestions & Answers (1)
Uni-ball Signo UM-151 gel ink pens, also known as Signo DX, are known for their smooth writing and exceptional ink quality. And, to everyone's delight, there is a sea of colors and tip sizes to choose from. Find the perfect pen for any task, whether it's writing meticulous notes, marking your calendar, or decorating your scrapbook with colorful captions.

Everything about this pen, from its solid construction to its carefully-formulated ink, ensures a wonderful writing experience. The sturdy tip does not bend or break, even with heavy-handed use. The pigment-based ink flows smoothly and is waterproof, fade-resistant, and feather-resistant. Much of that is due to special viscous properties of the ink. The ink is viscous while in the barrel, but as it passes through the pen tip during writing, the viscosity drops. This results in smooth ink flow. Immediately after it hits the paper, the ink returns to its viscous state, which prevents feathering. You are left with beautiful clean lines that you can enjoy for a long time!


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Customer Reviews

From the perspective...
January 29, 2011
Verified Purchase
From the perspective of a university student, this pen is excellent. From working out mechanisms in organic chemistry to just simply writing (notes or essays), this pen does an outstanding job.

Compared to the Uni-ball Signo RT UM-138 (0.38), this pen is better built, has a slightly more comfortable grip, has a much larger volume of ink, and writes with the same "thinness" (but with a darker black). The RT's black ink always have looked faded to me and they all definitely run out of ink way too rapidly or even a mediocre writer/drawer/whatever.

The RT has the "clicker" ability (which I originally wanted this pen to be and would buy another one if it were a "clicker") but the cap removal process isn't a big deal. I've actually started to like the look of the cap and the way it snaps on makes it feel like it's a high class pen.

Overall, this pen is one of the best that I've used.
10 people found this helpful
justin0979
A marvelous everyday...
September 1, 2011
Verified Purchase
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.
8 people found this helpful
mookiemorjax
The best everyday pen...
June 11, 2011
Verified Purchase
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.
4 people found this helpful
i bought this pen expecting...
March 28, 2014
Verified Purchase
i bought this pen expecting to be able to ink drawings for watercolor since it said it was waterproof, but this pen smears SO easily i'm incredibly disappointed.

also, as others have said, the ink flows out of the pen very smoothly, but the actual design of the pen makes it a bit uncomfortable to write with. it may just be that it's a bit wider than im used to
4 people found this helpful
Not sure what's going...
March 21, 2016
Verified Purchase
Not sure what's going on with the black ink lately. I have loved these for use with watercolors for a long time now. Purchased some black and black-brown pens as replacements for ones that had run out. The black-brown ink is just fine, no bleeding or smearing. However, the three black pens I purchased (.5, .38 and .28) are reactivated by water like most other pens would be. I'll keep them for use with dry media, but now have to find a gel pen I can use with my watercolors.
1 person found this helpful
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