The Permanent Black "Fount India“ is well-covering and non-fading, which makes it a permanent ink particularly suitable for artworks and important documents to last for many years. Unlike regular india ink, which cannot be used in fountain pens, Fount India can be used in barrel fountain pens, provided it is ensured the ink does not dry out. The fountain pen must be rinsed with cold water on a regular base. PLEASE NOTE — Strongly recommended that pens are flushed out after use. Storage of pens containing pigmented ink runs a high risk of drying out in the feed.