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Prairie Green
TWSBI's own ink line is formulated and bottled to pair with its piston-fill demonstrator pens.
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Paper & pairing
Greens read as more expressive than blue or black, a common choice for people who want color without leaving the realm of "still looks professional." 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 TWSBI
Founded in 2009 by Ta Shin Precision, a Taiwanese manufacturer with over 50 years of plastics and metals experience, TWSBI's first pen, the Diamond 530, introduced an affordable piston-fill demonstrator that reshaped the entry-level market.
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.