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Katsuo

Bungukan Kobayashi is one of the 713 brands in Inktend's built-in ink catalog.

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Specs

Color familyBlues & navies

Approx. hex#3987AF

SheenNot typically noted

BrandBungukan Kobayashi

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.

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About Bungukan Kobayashi

Bungukan Kobayashi (also known as Stationer's Kobayashi) is a stationery retail chain based in Shizuoka Prefecture, Japan. The shop is known for its store-exclusive fountain pen inks manufactured by Sailor, including a large Shizuoka-inspired series drawing on local landmarks such as Suruga Bay, and it has also collaborated with Tono & Lims.

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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

What color family is Katsuo?

Katsuo falls into Inktend's blues & navies family based on its typical swatch color.

Does Katsuo have sheen?

Katsuo is not typically noted for sheen. If you want that effect, browse similarly colored inks tagged with sheen in the ink library.

How should I store a bottle of Katsuo?

Years, easily, as long as it stays capped and out of direct sunlight. The thing that actually shortens an ink's usable life is sitting unused inside a pen, not sitting on a shelf.

What paper works best with Katsuo?

It behaves predictably on most fountain-pen-friendly paper. Stick to something reasonably absorbent-resistant, since cheap copier paper dulls saturation and can feather.

Similar shades By colour distance

Highland Park Zoo Polar Bear

Color shown is a close digital approximation of a typical swatch, not a calibrated color match.