Uni-ball ZENTO Gel Pen 0.5 Hematite

The uni-ball ZENTO Flow Model in Hematite is a Japanese rollerball pen with water-based pigment ink and a long aluminum grip. The shaft and anodized metal grip are color-coordinated, creating a two-tone, calm appearance in matte dark gray. At the center is the specially developed ZENTO ink, which thanks to an integrated surfactant (POA) significantly reduces writing friction while still producing clean, precise lines.

Special Features

• ZENTO Ink with Cushion Effect: A POA surfactant acts as a buffer between the ball and paper, reducing writing friction by approximately 40% compared to previous Uni products according to the manufacturer. The result is a uniform, effortless writing feel that causes little fatigue even during longer writing sessions.
• Attraction Particles: Special particles draw the ink together and reduce feathering and ink show-through on the back of the paper.
• Pigment-based Black Ink: Water-based and quick-drying.
• Long Aluminum Grip: The anodized metal grip gives the pen a pleasantly cool, solid feel and a noticeable but not heavy weight.
• Two-Tone Design in Hematite: The color is named after the mineral of the same name. Shaft, grip, and clip appear in coordinated shading.
• Movable Clip: The color-matched clip securely holds the pen on your notebook or planner.
• Click Mechanism: The tip extends and retracts at the push of a button; you don't need a cap.
• Refillable: Compatible with the ZENTO refill UBR-Z-05 (0.5 mm).

Application & Tips

• Journaling and Bullet Journaling: The 0.5 mm tip produces a clearly defined line, ideal for handwriting, headings, small drawings, and frames in planners. On smooth, calendered paper, the tip runs particularly smoothly.
• Study and Note-Taking: As minimal pressure is needed, the pen is gentle on your wrist and fingers, even after a long lecture.
• Paper Compatibility: On ink-resistant, smooth paper, ZENTO ink reaches its full potential. On highly absorbent or rough paper, the line may appear slightly wider.
• With Highlighters: Water-based highlighters can cause the ink to run. Let the ink dry thoroughly and test your highlighters beforehand on an inconspicuous spot.
• Handling: The aluminum grip is smooth. If you write with warm or moist hands, it's best to grip slightly higher.

Technical Specifications