The Octopus Fluids Document Inks are document-proof fountain pen inks which have been specially developed for professional use in the office, especially for signing under official documents and certificates.

Octopus Fluids Document Inks are waterproof, lightfast, smudge-resistant, non-erasable and resistant to ethanol, hydrochloric acid, ammonia, bleach and most other chemicals in accordance with the requirements of DIN ISO standard 12757-2.

The Octopus document inks are pigmented and vegan.