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4.6 (5 reviews)
Uni-ball Signo gel ink pens 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!

Model NumberUNI UM151.4
Weight0.4 ounces
Body Color Clear
Body Material Plastic
Clip Material Plastic
Clippable Yes
Color Set No
Diameter - Grip 10.3 mm
Diameter - Max 10.3 mm
Grip Color Orange
Grip Material Rubber
Ink Characteristics Waterproof
Ink Refillable Yes
Length - Capped 13.8 cm
Length - Posted 15.3 cm
Length - Uncapped 13.1 cm
Mechanism Capped
Pre-Installed Ink Color Orange
Tip Length 4.4 mm
Tip Material Metal
Tip Size 0.38 mm
Tip Type Conical

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Customer Reviews

It's a nice orange. Very...
March 7, 2011
Verified Purchase
It's a nice orange. Very bright indeed. The ink flow is exactly like the black DX. That makes me very happy. It takes very little pressure to write with this pen, just like the black DX.
1 person found this helpful
The color is exactly...
September 24, 2008
The color is exactly the same as shown on the plastic cap: a bright color of orange sherbet. Good for fun writing.
1 person found this helpful
Best orange pen I have...
February 11, 2015
Verified Purchase
Best orange pen I have found yet!
Uni Signos are solvent...
October 15, 2014
Verified Purchase
Uni Signos are solvent resistant so they are great for laboratory notebooks. Of course, orange ink isn't allowed for laboratory notebooks but, I can use them in/on my calendar.
Really nice orange. It...
September 12, 2014
Verified Purchase
Really nice orange. It is a little bit brighter than shown in the photo, but the color just makes all my annotations pretty. It doesn't glare out like red ink, so it provides the perfect amount of attention grabbing. Like other uni-ball pens, the ink glides smoothly and the weight of the pen makes writing comfortable.