Octopus Certified Document Ink – Dark Blue (50ml)

Dark Blue is a deep, authoritative navy-blue ink from Octopus Write & Draw — formulated specifically as a document ink for professional and archival use. Classic and understated, it delivers the reliable legibility of a traditional blue-black with a distinctly modern depth. Ideal for everyday correspondence, journaling, and any writing where permanence matters.

Ink Properties

• Colour: Deep dark blue (navy/blue-black tones)
• Volume: 50ml glass bottle
• Type: Water-based, document ink
• Water resistance: Yes — suitable for archival and document use
• Lubrication: Well-lubricated for smooth, consistent flow
• Dry time: Moderate
• Shading: Low — optimized for clean, consistent legibility

Compatible With

• Fountain pens (all nib sizes)
• Dip pens and drawing nibs
• Brush pens and technical pens

About Octopus Write & Draw

Based in Germany, Octopus produces reliable, document-safe inks formulated for long-term stability and everyday use. Free from harmful substances and built for writers, illustrators, and pen enthusiasts alike.