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Kingfisher
Bungubox X Esterbrook is one of the 713 brands in Inktend's built-in ink catalog.
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Specs
Paper & pairing
Blues and navies are the most broadly "safe" fountain pen colors: legible, professional, and unlikely to raise eyebrows in an office. This ink will behave predictably on most fountain-pen-friendly paper. Cheap, highly absorbent paper (standard copier paper) will dull any ink's saturation and can cause feathering or bleed-through with wetter nibs.
About Bungubox X Esterbrook
A collaboration between Bungubox, a Japanese stationery boutique founded in Hamamatsu in 2012 and famed for its exclusive inks, and Esterbrook, the revived American heritage pen brand. Their joint Kachofugetsu collection pairs limited-edition Estie pens with matching bottled inks inspired by the Japanese concept of the beauty of flowers, birds, wind and moon.
Storing and using the bottle
Bottled fountain pen ink has an effectively long shelf life when kept capped and out of direct sunlight: most inks remain usable for years. The main risk isn't the ink spoiling, it's a pen sitting inked and unused for weeks: that's what causes clogs, not the ink's age.
Frequently asked questions
Similar shades By colour distance
Color shown is a close digital approximation of a typical swatch, not a calibrated color match.