Uni-ball Uni Pin Fineliner, 0.1 mm, Waterproof Pigment Ink, Precise Writing, Smooth Flow, Comofortable Grip, Ideal for Teachnical Writing & Drawing - Black

Ultra-Fine Point: 0.1 mm tip for tiny, legible lines. Archival Pigment: Waterproof and fade-resistant ink. Metal-Clad Nib: Maintains accuracy under rulers and templates. Smooth Flow: Consistent feed to prevent scratching on paper. Use: Ideal for annotations, technical drawings, and fine line art.

The 0.1 mm Uni Pin Fineliner offers finer lines and archival waterproof ink compared with common 0.3–0.5 mm fineliners. For broader linework or drafts, you might prefer larger tip sizes. If you want to compare similar options on Fepy.com, you can explore: https://fepy.com/search?q=fineliner+0.1mm and https://fepy.com/search?q=uni-pin+fineliner+0.1mm

Technical drawing, schematics, architectural diagrams, precise handwriting in planners, and fine line art. The 0.1 mm tip is especially helpful when you need clean, legible details and tight line work.

Keep the cap on when not in use and store upright. Press with a light, steady touch to avoid excessive pressure. Use on smooth, bleed-resistant papers to maximize ink performance. If you notice skipping, test on scrap paper and ensure the nib is clean before continuing.

The ink is designed for writing and drawing, typically non-toxic for consumer use. As with any writing instrument, avoid ingestion and contact with eyes. Keep out of reach of small children and store the pen away from food preparation areas.

Uni Pin Fineliners generally feature a durable metal-clad nib designed for extended use, with nib replacements or compatible refills sometimes available separately. Check the product page or search for Uni Pin fineliner nib replacements on Fepy.com to confirm availability.

Yes. The ultra-fine 0.1 mm line and smooth flow make it excellent for planner entries, grid layouts, and layout diagrams where precise, neat lines are important.

Archival pigment ink resists water and fading, helping your notes, diagrams, and artwork stay legible and true to detail even after exposure to moisture or sunlight over time.

Smooth, bleed-resistant papers such as high-quality printer paper, marker paper, or layout sheets are ideal. Heavier-weight papers can handle fine lines well, while very absorbent papers may cause mild feathering with heavy ink deposition.

It combines a precise 0.1 mm tip with durable construction, consistent ink flow, and archival waterproof ink—providing consistently sharp lines and long-term legibility that cheaper pens may not deliver.

Store capped and upright when not in use. Avoid prolonged pressure on the nib and keep it away from extreme heat. Transport in a protective case to prevent nib damage and ink leakage.