Sailor Nano Souboku Blue Black Pigment Fountain Pen Ink
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Souboku is a true-to-form blue-black ink. There is a moderate amount of shading, so there is some nice gradation in color. At it’s lightest, the ink is a slate blue. From there, the ink shades to an aegean blue before finishing as a dark navy denim. The ink dries to a matte finish, so you’re not likely to note much sheening.
This pigmented ink was designed for brush pens, but is safe for use in fountain pens as well. Like any pigmented ink, proper care for cleaning your pen should be exercised when using this or any pigmented ink. Do not leave it in your pen for weeks on end without cleaning. The pigment particles, if left to dry, can require a little more maintenance to clean out.