Nano-Pigment Fountain Pen Ink, Seiboku

Made with Sailor's proprietary nano-pigment process, this gorgeous blue ink flows perfectly through fountain pens, but unlike many inks, it's lightfast & water-resistant when dry. "Seiboku" is one of two blues offered in nano-pigment formulations. It's what we would call a marine blue, with a cheerful turquoise appearance when used in a writing pen, and deep, blue-black tones when applied thickly with a brush.

Sailor nano-pigment inks come in a heavy glass bottle with square edges and an iridescent blue cap. The bottle label is made from washi paper and features visible fiber inclusions—an elegant reminder of this ink's Japanese heritage.

50 mL bottle with cardboard storage box. Made in Japan.