Elevate your documents with Octopus Document Ink - Dark Blue. Specially developed for professional use, these permanent inks are perfect for signing official papers. Waterproof, lightfast, and resistant to various chemicals, they ensure your documents maintain their integrity over time. Make your mark with confidence using Octopus Fluids Document Inks.

Finest pigments are used for the inking. This gives you a strong typeface. The document inks differ from the Octopus Write and Draw Inks in that they contain less binder. This ensures an optimal ink flow and makes cleaning the fountain pen easier. Nevertheless, even with these inks, drying in the fountain pen should be avoided and the pen should be cleaned thoroughly before prolonged non-use.