Uni-ball Uni Pin Compo Fine Ball Pen, 0.3 mm, Pigment Ink, Smooth Ink Flow, Optimized Control, Ideal for School, Home & Office Use, Black – Pack of 12

Tip size: 0.3 mm ultrafine; Ink: pigment-based black with archival, waterproof, and fade-resistant properties; Nib: metal-clad for durability; Pack size: 12 pens; Finish: black ink.

A 0.3 mm tip creates razor-thin, precise lines that are great for grids, hatching, labels, technical drawings, and delicate lettering. It’s excellent for detail work in school, home, and office projects.

Yes. The pigment ink is designed to be waterproof and fade-resistant, helping your lines stay legible over time.

The nib is metal-clad, which reinforces the tip and keeps it from wearing down quickly when tracing with rulers, templates, or guidelines.

It performs well on standard writing and drawing papers. It’s particularly suitable for graph paper, sketchbooks, planners, and notebooks used in school, home, or office settings.

Apply light, steady pressure and let the ink flow smoothly. Start with light strokes for thin lines and gradually build up for darker lines. Cap the pen when not in use to prevent drying.

Keep the cap on when not in use, store in a cool, dry place, and avoid excessive heat or direct sunlight. If the ink dries, gently re-prime by making light strokes on scrap paper.

If you’re deciding between 0.3 mm options on Fepy, you can compare the Uni Pin Compo Fine 0.3 mm with similar 0.3 mm pigment liners to evaluate nib feel and ink behavior. For instance, you can explore alternatives like the Uni Pin Fine Line 0.3 mm and Staedtler pigment liners to see differences in line consistency and wear resistance. See related options here: https://fepy.com/product/uni-pin-fine-line-0-3mm-black-12-pack, https://fepy.com/product/staedtler-pigment-liner-0-3mm-black, and https://fepy.com/product/zebra-micron-0-3mm-black.

Use it for architectural diagrams, precise labeling, technical notes, fine art sketching, journaling, and school projects that require clean, durable lines.

Yes. The pigment ink provides archival-quality, waterproof, and fade-resistant lines, making it suitable for long-term documentation and art that you want to endure over time.

The pack contains 12 pens in black. Buying in bulk generally reduces the cost per pen, making it a cost-effective choice for classrooms, studios, or offices with frequent use.