| Description | Specifications | Questions & Answers |
Uni-ball One ink doesn't just look good—it may even help you be a better student. A study at Ritsumeikan University in Japan found that students who studied notes written with a black Uni-ball One pen were better able to recall the information than students reading notes written in ordinary black ink.
Compared to the original Uni-ball One, the Uni-ball One F features a wider barrel and a lower center of gravity, making it more comfortable to use for long writing sessions.
Features:
| Model Number | UNI 0423-01 |
| Manufacturer | Uni |
| Body Color | Black |
| Body Material | Plastic |
| Capped or Retractable | Retractable - Top Button |
| Clip Material | Metal |
| Clippable | Yes |
| Diameter - Grip | 9.0 mm |
| Diameter - Max | 11.1 mm |
| Features | Spring-Loaded Clip |
| Grip Color | Black |
| Grip Material | Plastic |
| Ink Characteristics | Fade-Resistant, Fraud Prevention, Quick-Drying |
| Ink Composition | Pigment-Based, Water-Based |
| Ink Refillable | Yes |
| Length - Retracted | 13.9 cm / 5.5 inches |
| Pre-Installed Ink Color | Black |
| Tip Material | Metal |
| Tip Size | 0.38 mm |
| Tip Type | Conical |
| Water-Resistant | Water-Resistant |
| Weight - Whole Pen (with Ink) | 0.51 oz / 14 grams |