The Octopus Write & Draw inks are unique, smudge-proof and waterproof writing and drawing inks in a wide range of colours. They were developed for daily use in fountain pens and are also popular with graphic artists, illustrators, calligraphers and artists for writing, sketching, drawing and colouring with calligraphy pens, glass pens or brushes. Unlike most other waterproof inks, Octopus Write & Draw can be used in a fountain pen without hesitation. However, care should be taken not to let the fountain pen dry out. The water resistance of Write & Draw Inks is created with the help of a cross-linking binder, which cannot be easily dissolved when dry. We therefore recommend that you rinse and clean your writing instrument carefully after use to prevent the ink from drying up accidentally. The Octopus Fluids special cleaner for pigmented inks is available for cleaning your writing Instruments. All inks are made exclusively with vegan ingredients.