Gel pen uni mitsubishi pencil UM-100 black — refillable gel ink pen, 0.5 mm tip (UN1021)

The uni mitsubishi pencil UM-100 black is a refillable gel ink pen with a 0.5 mm tip designed for smooth, consistent writing. The gel-based ink delivers strong black lines and clear legibility for everyday handwriting, note-taking and office use. The slim, balanced body supports comfortable grip and controlled strokes for tasks that require precision and reliability.

Advantages

The refillable design reduces waste and allows continued use with compatible gel refills. The fine 0.5 mm tip produces precise, clean lines suitable for detailed writing and small handwriting. Gel ink technology gives even, saturated black color and resists uneven flow, providing consistent results on common office and school papers.

Suitable for

• Everyday handwriting and journaling
• Note-taking in lectures and meetings
• Office documentation and forms
• Precise annotations, underlining and corrections
• Student use for homework and exams

Key specifications

• Ink type: gel-based black ink for strong, consistent color
• Tip size: 0.5 mm fine tip for precise lines
• Body: slim, balanced pen body designed for comfortable grip
• Refillable: compatible with designated gel refills to extend product life
• Writing performance: smooth ink flow with clear legibility on standard paper

How to use

Remove the cap or retract the tip as applicable, hold the pen at a natural angle and apply light to moderate pressure for best performance. Use the 0.5 mm tip for precise lines and avoid excessive pressing to prevent tip damage or ink blotting. When the ink runs low, replace with a compatible gel refill following the manufacturer’s refill instructions to maintain optimal writing quality.

Usage recommendations

For consistent results, store the pen horizontally when not in use and keep the cap closed to prevent the tip from drying. Use on standard office or notebook paper; test on specialty papers first to ensure compatibility.