Uniball One F

Thematic shaft color and low center of gravity for stable writing

The color of the barrel is inspired by familiar scenes from everyday life and nature.

The stabilizer mechanism provides a stable writing feel with a low center of gravity.

Colors of the barrel are inspired by the familiar colors we see in our daily lives.

The colors of the barrels are faded, taking into account that the scenery we see in our daily lives changes with the seasons and circumstances, and that the colors are not primary colors, but rather vague colors. The name of each axis color was taken from a casual scene in daily life, so that the user can share the emotional sensitivity of the pen.

About Guinness World Records™ certification

　Gel-ink ballpoint pen with darker black and more vivid color "Notebook, clear and sharp. On July 3, 2023, the "uni-ball one" series was recognized by Guinness World Records™ as the "Blackest gel ink ball pen".

　Joint research conducted by Ritsumeikan University and our company has shown that dark, clear black text is more memorable. By using the "uni-ball one" series, the world's blackest gel ink ballpoint pen, you can write letters that will leave a lasting impression when you look back at your notebook and help improve your memory.