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Gunma Forest Blue
Ink Mazeru is one of the 713 brands in Inktend's built-in ink catalog.
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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 Ink Mazeru
Ink Mazeru (from the Japanese word "mazeru," to mix) is a blendable fountain pen ink line from KA-KU, a Japanese pen retailer based in Osaka. The water-based dye inks come in numbered, emotion-themed base colors formulated to be mixed freely while keeping good color development and low cloudiness, and the line also includes shop-original colors created for individual stationery stores.
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.