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Basalt
Tintenlabor is one of the 713 brands in Inktend's built-in ink catalog.
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Paper & pairing
As a near-neutral tone, it reads as professional and safe for anything from journaling to signatures. 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 Tintenlabor
Tintenlabor ('ink laboratory') is a small Swiss ink maker specialising in iron gall fountain pen inks. Unusually, each bottle declares its iron and dye content so users can choose inks by formulation, with colours including blue, blue-black, green, purple and grey sold in 10, 30 and 50 ml bottles via its German-language web shop.
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.