The Uni-ball Signo is a legendary gel pen from Japan. Thanks to its incredible performance and wide range of ink colors—including inks with special effects—it’s no wonder that the Signo is a favorite gel pen for students, professionals, and crafters alike.
Keep reading or watch the video below to find out what sets the Signo apart from other gel pens.
We also appreciate that all Signo Gel Pens are filled with pigment-based inks that won’t disappear when exposed to water. The standard colors that don’t have metallic or glitter effects are even considered fraud resistant because they won’t be washed away by acetone or rubbing alcohol. Because of its permanence, the Signo is an excellent option for signing important documents or writing checks.
We created the dry time and water test in the image above on the 80 gsm Rhodia DotPad. Inks tend to take longer to dry on Rhodia than on more absorbent papers like printer paper. For the water test, we allowed our writing sample to dry for fifteen minutes before soaking it in water.
Most gel pens have sleeves with sharp corners, which can scrape along the writing surface. The Uni-ball Signo RT and RT1 Gel Pens feature “edgeless tips” with rounded corners. They reduce friction against the paper, allowing them to glide effortlessly across the page.
Uni-ball Signo Gel Pens come in capped and retractable body styles. Some lines may also have rubber grip sections.
Pen | Name | Length | Diameter | Weight |
---|---|---|---|---|
UM-151 | 13.8 cm | 10.3 mm | 0.41 oz | |
UM-100 | 15.1 cm | 9.8 mm | 0.42 oz | |
Broad UM-153 & Impact | 13.9 cm | 9.8 mm | 0.47 oz | |
RT | 13.9 cm | 9.6 mm | 0.35 oz | |
RT1 | 14.1 cm | 10.6 mm | 0.39 oz | |
207 | 14.2 cm | 11.2 mm | 0.37 oz | |
207 Impact | 14.0 cm | 9.7 mm | 0.47 oz | |
207 Impact RT | 14.5 cm | 11.2 mm | 0.49 oz | |
207 Premier | 14.4 cm | 11.4 mm | 0.69 oz | |
307 | 14.2 cm | 11.5 mm | 0.36 oz | |
Noble Metal | 15.6 cm | 9.8 mm | 0.44 oz | |
Sparkling | 15.5 cm | 9.2 mm | 0.43 oz |
The UM-151 is also known as the Signo DX.
Professionals can check out the Signo 207 BLX, which features off-black ink that adds a little personality to your writing without standing out too much.
Choose from the capped 207 Impact or the retractable 207 Impact RT.
The Uni-ball Signo offers an impressive lineup of pens that are perfect for everything from everyday writing to craft projects. Let us know how you use your Signo Gel Pens in the comments below!
If you’re looking for a gel pen that has even more pigmented ink, check out the Uni-ball One. It’s formulated with large pigment particles that stay on the surface of the paper for vibrant writing that’s easy to read.