uni-ball one – Vivid, Smudge-Free Writing for Smarter Notes

Discover the power of clarity with the uni-ball one, a sleek gel pen engineered for high-contrast writing, smooth performance, and smart design. Whether you're taking class notes, journaling, or drafting important documents, the Uni-ball One brings your words to life with bold blacks and vibrant colors that stand out on the page.

Its proprietary uni-ball one Ink, developed through research with Ritsumeikan University, uses large pigment particles that stay on the surface of the paper—producing sharper, darker lines that are easier to read and even easier to remember. Perfect for students, professionals, and creatives who demand both performance and style.

What Makes the Uni-ball One Unique:

• Darker Ink for Better Memory: The extra-bold black ink creates sharper characters proven to enhance recall—ideal for study notes and to-do lists.
• Vivid, High-Contrast Colors: Delivers exceptional vibrancy without bleeding or feathering.
• Quick-Drying, No Bleed-Through: Advanced ink formulation dries fast without soaking into paper, reducing smudging and keeping pages clean.
• Minimalist, Functional Design: The slim, straight barrel fits comfortably in hand, while the oval open-wire clip offers flexible attachment to notebooks and planners.
• Color-Coded Style: Black ink pens feature a sleek black barrel; color inks come with soft off-white bodies for a calm, stylish aesthetic.

Specifications:

• Ink Type: uni-ball one gel ink with Bead Pack Pigment technology
• Barrel Design: Straight, minimalist profile
• Clip: Oval-shaped stainless steel open-wire clip
• Dimensions: 139.5 × 10.5 × 15 mm
• Weight: 9.6 g
• Refillable: Yes (Uni-ball One refills)

For clean, legible, and unforgettable writing, the Uni-ball One is the everyday gel pen that delivers more.