Uni-ball Uni Pin Fineliner Set, Waterproof Pigment Ink, 0.1/0.3/0.5 mm, Super Ink, Smooth & Precise Flow, Ideal for Technical Writing & Drawing, Black – Pack of 3

Yes. The Uni Pin Fineliner uses pigment ink that is waterproof and fade-resistant, designed to preserve sketches and notes over time.

Ideal for technical writing, architectural or engineering diagrams, schematic drawings, precise annotations, and tidy notes in planners or journals.

The pens deliver a regulated flow for clean, consistent lines with minimal scratching, even when rendering fine details.

Yes. The metal-clad tips are designed to stay true under rulers and stencils and resist wear during precise drawing tasks.

The ink color is black.

Keep the cap on when not in use, store in a cool, dry place, and avoid applying excessive pressure on the nib. If a nib dries, test gently on scrap paper to restore a smooth line.

They work well on standard drawing and notebook papers. For waterproof surfaces or specialty papers, test on a small area first to ensure compatibility.

Compared with other fineliner sets on Fepy, this Uni-ball set combines three tip sizes in one pack with waterproof pigment ink. Alternatives you might consider include: Uni-ball Signo Fineliner Set (0.5 mm) - https://fepy.com/product/uni-ball-signo-fineliner-0-5mm-pack-of-3-black, Staedtler Pigment Liner Set (0.1/0.3/0.5 mm) - https://fepy.com/product/staedtler-pigment-liner-0-1-0-3-0-5-black, Sakura Pigma Micro Fineliner Set (0.1/0.3/0.5 mm) - https://fepy.com/product/sakura-pigma-micro-fineliner-set-0-1-0-3-0-5-black-pack

Yes. The three-tip combination provides versatility across many precision tasks, making it cost-efficient for both professional work and everyday hobby use.

Recap after use, store with tips capped, avoid pressing too hard, and if ink appears faint, rotate or test the other tip sizes for the task at hand.

Smooth, bleed-resistant papers and technical drawing papers are ideal. For highly absorbent notebooks, test first to prevent excessive bleed-through.