Uni-ball One Gel Pen

The Uni-ball One uses a specially formulated gel ink that sits on the surface of the paper rather than absorbing deeply into it. This results in an incredibly vibrant, dark ink color that resists fading and bleeding through pages.

The pen utilizes a unique air-pumping system and a smooth, highly durable ball mechanism to deliver consistent ink flow. This design ensures a smooth writing experience without the annoying skips common in lesser gel pens.

The Uni-ball One gel pen is commonly available in several precise nib sizes, including 0.38mm and 0.5mm. These options cater to users who prefer either ultra-fine writing or standard note-taking thickness.

Yes, the proprietary pigment-based ink used in the Uni-ball One is water-resistant once it has completely dried. This makes it a highly reliable choice for important documents that need to withstand accidental spills.