Uni-ball Uni Pin Fineliner, 0.6 mm, Pigment Ink, Archival, Smooth Writing, Bold Detailing, Ideal for Technical Drawing & Writing - Black

A 0.6 mm line produces a confident, bold stroke suitable for strong borders and emphasis. Use it when you want prominent lines; if you need finer detail, consider thinner fineliners available on Fepy.

It uses archival pigment ink that is waterproof, lightfast, and quick-drying, helping drawings and notes reproduce cleanly and resist fading over time.

The metal-clad tip maintains its shape along edges and stencils, delivering consistent, precise lines when drawing along rulers or using stencils.

The ink dries quickly to minimize smears. Allow a moment after writing before touching the ink and keep the cap on when not in use to prevent drying out.

Ideal for technical drawing, bold headings, borders, sketch contours, notes, and illustration accents on clean, smooth paper.

Cap the pen securely after use, store in a cool, dry place, and avoid excessive pressure on the tip. If the tip becomes worn, consider replacing the pen for best results.

The pen uses pigment-based ink designed for consumer use and offers waterproof, archival performance. Check the product packaging for safety labeling and guidelines if you have specific safety requirements.

For finer lines, you might look at Uni Pin Fineliner 0.5 mm (slightly thinner stroke) at https://fepy.com/product/uni-pin-fineliner-0-5-mm-black. For very fine work, Staedtler pigment liners like 0.3 mm are also available at https://fepy.com/product/staedtler-pigment-liner-0-3-mm-black. The 0.6 mm option offers bolder lines ideal for emphasis and borders.

If you’re not satisfied, you can return unused items in their original packaging within the store’s stated return window for a refund to your original payment method.

Smooth, bleed-resistant papers pair best with pigment inks like this. Test on a sample of your preferred paper to ensure no bleed-through or feathering occurs.

This model features a fixed nib with a metal-clad tip designed to hold its shape. Nibs are not typically sold separately; if the tip wears, replacing the pen is usually recommended for consistent performance.