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Matchmaking of Money
KA-KU is one of the 713 brands in Inktend's built-in ink catalog.
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Paper & pairing
Browns tend to photograph and scan a little darker than they look in person, worth testing before using one for anything that will be digitized. 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 KA-KU
KA-KU is a Japanese fountain pen specialty retailer operated by KAKU Co., Ltd., headquartered in the Osaka area. The name means 'to write' in Japanese, and the company runs pen shop counters in department stores along with an online store carrying fountain pens, world stationery, and art supplies, and serves as the Japanese importer of TWSBI. KA-KU also offers original fountain pen inks, including region-themed colors and its mixable 'ink mazeru' line.
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.