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Colors of Nature - Rain Water
IWI 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 IWI
IWI is the house brand of International Writing Instrument Corp., a Taiwanese manufacturer whose pen production dates to 1975, with the company formally established in 1985 and recorded as Taiwan's largest metal pen exporter. The IWI brand itself launched in 2015, offering fountain pens, rollerballs and ballpoints that pair Taiwanese manufacturing with affordable design, exported to more than 80 countries.
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.