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Uniball Signo UM151 Review Revisiting an Old Favorite


Uni-ball Signo UM-151 Color Samples

I have reviewed many color and size combinations of the popular Uni-ball Signo UM-151 which also used to be called the Signo DX, but recently realized that its been a while since I really put them to use.  These were an early favorite that I discovered from reading some of Brad’s great reviews of them so I decided it was time to re-establish them as a go-to option for daily use.


Uni-ball Signo UM-151 Tip Comparison – Left is the .38mm Right is the .28mm

The Uni-ball Signo UM-151 comes in a huge variety of colors and are available in two of my favorite tip sizes, .28mm and .38mm.  Personally I don’t mind the somewhat scratchy feel that you get with the .28mm version of the Uni-ball Signo UM-151, but the .38mm is actually pretty smooth for such a small tipped pen.  I tend to use the .38mm versions for some daily note taking and the .28mm versions usually end up as my editing and updating pens for when I have to squeeze in some small handwriting to existing notes to clarify or update something.    I use the .38mm version for daily notes in some recurring weekly meetings that I run, and the notes just run along a chronological stream in one of my Levenger Circa notebooks.  Each week when I start a new section of notes after the previous week’s notes, in a new color, its a great way to help differentiate and also remember where things are in the notes for later reference.  The bright bold colors and the wide variety that they come in help make notes more memorable for me, so that is a big win from a work and organizational perspective.


Uniball Signo UM-151 Body

Forgive me for the older picture from an earlier review of the pen, but the Uni-ball Signo UM-151 body remains the same with some minor differences in the branding and markings on the pen which are now done via removable stickers, which I prefer.  Overall though the bodies on these pens are perfect because they are quite durable and they are transparent so you can see how much ink you have left in he refill.  They also have a no non-sense comfortable grip that makes them great for every day and frequent use.  One minor issue I have always had is the tiny caps on these pens.    This is just more of a style preference for me, it doesn’t change the performance of the pen, but I’ve noticed that I tend to drop these caps and misplace them more often than caps for my other pens.


Uni-ball Signo UM-151 Clips

Speaking of the clips on the Uni-ball Signo UM-151 here is a quick look at them so you can see the main difference between the .38mm and .28mm version of this pen.  The 28mm cap has a clip that matches the pens color, but is translucent as compared to the .8mm version that has a solid (yet still color matched) clip.  Again, not a big deal, but definitely helpful in quickly identifying which version you are grabbing for if you have multiple versions of these in your pen case as I do.

Uni-ball Signo UM-151 Summary

For a few weeks now I’ve really been enjoying and getting benefit out of making the Uni-ball Signo UM-151 a regular part of my rotation again.  The huge variety of colors, multiple tip sizes, and great construction make these pens a great all round option for so may different purposes.  If you have not tried them, or like me have neglected them recently I highly recommend getting back in the game with them, JetPens has the biggest selection I’ve seen and also has the .5mm versions, while Amazon also has some available.  Regardless of where you get them, I hope you give them a chance and enjoy them as much as I have been.

©2016, Brian Greene. All rights reserved.


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