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Ink Guide

Best Fountain Pen Inks: Our Top 10 Picks for Every Writer

Published: 2026-04-04

Choosing the right ink is just as important as choosing the right pen. A great ink transforms the writing experience with beautiful color, smooth flow, and interesting properties like shading and sheen. Here are our top picks across every category.

Best Overall: Pilot Iroshizuku Kon-peki

Kon-peki (Azure) is quite possibly the most popular fountain pen ink in the world, and for good reason. This cerulean blue exhibits stunning shading — from light sky blue in thin strokes to deep azure in pooling areas. It flows beautifully in any pen, dries at a reasonable speed, and never clogs. If you buy one bottle of ink, make it this one.

Properties: Saturation 4/5 | Shading 5/5 | Sheen 3/5 | Flow 5/5 | Water Resistance 1/5

Best Black: Platinum Carbon Black

For a true, deep black that is also waterproof, Platinum Carbon Black is the gold standard. This carbon pigment ink produces an intensely dark line that resists water, making it suitable for documents that need to last. Unlike many pigment inks, it flows reasonably well in fountain pens — just make sure to flush your pen regularly to prevent clogging.

Properties: Saturation 5/5 | Shading 1/5 | Sheen 1/5 | Flow 3/5 | Water Resistance 5/5

Best Waterproof: Noodler’s Bulletproof Black

If waterproofing is your top priority, Noodler’s Bulletproof Black is the ultimate choice. Its cellulose-reactive formula bonds permanently to paper, resisting water, bleach, and UV light. Essential for check writing, archival documents, or any situation where permanence matters. The flow is adequate but not as smooth as dye-based inks.

Properties: Saturation 5/5 | Shading 1/5 | Sheen 1/5 | Flow 3/5 | Water Resistance 5/5

Best Purple: Pilot Iroshizuku Yama-budo

Yama-budo (Wild Grape) is a stunning crimson-purple that shifts between wine red and magenta depending on the light and nib wetness. On premium paper, it displays beautiful gold sheen that appears almost magical. This is one of the most versatile non-traditional colors — bold enough to be interesting, professional enough for everyday use.

Properties: Saturation 4/5 | Shading 4/5 | Sheen 4/5 | Flow 5/5 | Water Resistance 1/5

Best Teal: Pilot Iroshizuku Tsuki-yo

Tsuki-yo (Moonlit Night) is a sophisticated teal blue with green undertones. More subdued than Kon-peki, it is an excellent choice for professional settings where you want something more interesting than plain blue but still business-appropriate. The shading is lovely, transitioning from teal to dark blue-green.

Properties: Saturation 3/5 | Shading 4/5 | Sheen 2/5 | Flow 5/5 | Water Resistance 1/5

Best Green: Sailor Jentle Tokiwa-matsu

Tokiwa-matsu (Evergreen Pine) captures the essence of an ancient pine forest in ink form. This deep, well-behaved green offers subtle shading from forest to olive tones. It is one of Sailor’s best-performing inks in terms of flow and dry time, making it a practical daily choice for green ink lovers.

Properties: Saturation 4/5 | Shading 3/5 | Sheen 2/5 | Flow 4/5 | Water Resistance 1/5

Best Sheening Ink: Pelikan Edelstein Tanzanite

Named after the rare gemstone, Tanzanite is a gorgeous blue-purple that exhibits stunning purple sheen on quality paper. From Pelikan’s premium Edelstein line, it flows beautifully and dries quickly. The sheen effect is dramatic but requires fountain-pen-friendly paper (Tomoe River, Rhodia, or Leuchtturm) to fully appreciate.

Properties: Saturation 4/5 | Shading 3/5 | Sheen 4/5 | Flow 5/5 | Water Resistance 1/5

Best Dark Red: Diamine Oxblood

Diamine Oxblood is a rich, dark red reminiscent of vintage leather. It offers excellent shading from bright red in thin strokes to near-black in heavy applications. At Diamine’s typically affordable price point, it represents outstanding value. This is the ink for anyone who wants a distinguished alternative to standard red.

Properties: Saturation 4/5 | Shading 4/5 | Sheen 2/5 | Flow 4/5 | Water Resistance 1/5

Best Blue for Work: LAMY Crystal Benitoite

Benitoite from LAMY’s Crystal ink line is a dependable medium blue that pairs perfectly with LAMY pens. Named after the rare Californian gemstone, it offers pleasant shading without being too flashy for professional use. Quick drying and well-behaved on most papers.

Properties: Saturation 3/5 | Shading 4/5 | Sheen 2/5 | Flow 4/5 | Water Resistance 1/5

Best Luxury Black: Montblanc Mystery Black

Mystery Black is Montblanc’s signature ink — a deep, saturated black that lubricates pens beautifully. It lacks the waterproofing of pigment inks, but its smooth flow and consistent performance make it the safe choice for premium pens. If you own a Montblanc pen, this is the natural pairing.

Properties: Saturation 5/5 | Shading 1/5 | Sheen 1/5 | Flow 4/5 | Water Resistance 2/5

Tips for Choosing Ink

  1. Start with blue or blue-black — the most versatile colors for everyday use
  2. Match ink to paper — sheening and shading inks need quality paper to shine
  3. Avoid shimmer inks in expensive pens — glitter particles can clog feeds
  4. Flush between colors — always clean your pen when switching inks
  5. Sample before committing — many retailers sell ink samples so you can try before buying a full bottle