Uni-ball One Gel Pen 0.38 / 0.5mm / Refill

Description

Features

• Revolutionary bead-packed pigment-based technology ensures your lines sit on top of the paper fibers for maximum color density and a professional finish🖋️.
• Scientifically backed memory retention study results from Ritsumeikan University suggest that the ultra-dark ink helps students and professionals recall information more effectively during review sessions📓.
• Functional and stylish wire pocket clip opens wide to secure your pen to thick notebooks, denim pockets, or clipboards without losing its springy tension🖇️.
• Designed with minimalist Japanese stationery aesthetics in mind, featuring a sleek white barrel and a subtle color-coded indicator for effortless identification in your bag👜.
• A global favorite for school supplies, offering smooth-flowing ink that resists bleeding through even thinner paper types common in classrooms worldwide🌍.

Specifications

• Brand: Uni
• Country of Brand Origin: Japan
• Model: One (UMNS05 / UMNS38)
• Weight: 14g (0.5oz)
• Ink: Darker and vivid gel ink
• Pen Nib Size: 0.38 mm / 0.5 mm
• Refill Model: UMR-05S (0.5mm) or UMR-38S (0.38mm)

Package Includes

• 1 x Uni-ball One Gel Pen 0.38 / 0.5mm / Refill

Q&A

How can I fix my pen if it starts skipping while I'm writing?

If your pen skips, it is often due to air bubbles or dried pigment particles. Try removing the refill and placing the tip in warm water for ten minutes to loosen the ink💧. Scribbling in circles on a high-friction surface, like the bottom of a shoe, can also restart the conical nib mechanism smoothly👟. Using a writing board under your page helps prevent skin oils from causing issues with ink flow✋.

Does the deep black ink really help with studying and memory?

Yes, it does! Research conducted at Ritsumeikan University indicates that the higher contrast of this ink compared to standard pens increases brain activity related to recognition🧠. This Uni-ball One review highlight confirms that the ultra-vivid black lines make information stand out, allowing your eyes to track and store data more efficiently during long study sessions📚.

What is the difference between pigment ink and standard dye ink?

Pigment ink uses fine particles suspended in liquid that sit on top of the paper fibers rather than soaking in. This creates better lightfastness and water resistance compared to dye-based inks, which dissolve completely into the paper. This pigment-based technology ensures your writing stays permanent and archival, resisting the fading commonly seen with cheaper alternatives over time🛡️.