Souboku Pigmented Blue-Black Ink

Sailor's Pigmented inks are permanent and water-resistant, so they're great for important letters and documents. Souboku is a rich blue-black color. Pigmented inks contain tiny particles which can clog up a pen if it sits for too long without writing, so it's best to clean your pen regularly when using them. Staff pick! Jean says: "These permanent and strongly water-resistant inks are my favorite when I'm writing something that I want to keep. They write smoothly, are easy to maintain compared to most permanent inks, and rarely bleed or feather, even on copy paper." Pigment-based fountain pen ink Available in 50 ml bottle or 4 ml sample Looking for a different shade of ink? Our ink comparison chart shows all the colors side-by-side.