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

The pen uses archival pigment ink which is waterproof and fade-resistant. This helps lines stay legible over time and resist smudging once dry.

The 0.3 mm ultra-fine tip provides extremely precise, fine lines, making it great for grids, hatching, labels, technical notes, and detailed drawings.

It performs well on standard paper, notebooks, sketchbooks, and most office or school papers. The pigment ink is designed for durable lines, though very slick or coated surfaces may require extra drying time.

Keep the cap closed when not in use and store in a cool, dry place away from direct sunlight. If the ink seems to dry out, a quick scribble on scrap paper can help re-wet the tip. Avoid excessive pressure to prevent nib wear.

Yes. The pigment ink is waterproof and fade-resistant, helping your lines stay clear and legible over time even with exposure to moisture or light.

Ideal for schoolwork, home labeling, office notes, diagrams, technical drawings, and journaling where fine, consistent lines are needed and archival quality is important.

Use short, controlled strokes with a steady hand. Let the tip glide smoothly and avoid heavy pressing. Pairing the pen with good quality, white or light-cream paper helps minimize feathering and ensures consistent ink flow.

Both offer fine, archival-quality lines with pigment ink. Staedtler’s option is a strong alternative if you’re comparing brands for price or availability. You can view it here: https://fepy.com/product/staedtler-pigment-liner-0-3mm

Sakura Pigma Micron is another popular pigment-ink option with a fine 0.3 mm tip. It’s well-regarded for archival quality as well. See it here: https://fepy.com/product/sakura-pigma-micron-0-3mm

0.3 mm is best for the finest lines, detailed work, and tight labels. If you need bolder lines for headings or quick notes, consider larger nibs like 0.5 mm or 0.8 mm. You can pair multiple nibs to cover different tasks.

These Uni Pin Compo pens are typically sold as individual units. When the ink runs out, you’d replace the pen with a new one rather than refilling the cartridge.