Van Dieman’s Fountain Pen Ink Diluter and Rehydrator is a 100ml solution specially formulated to restore, refine and extend the life of your favourite inks. Designed for fountain pen users who appreciate precision and consistency, this multi-purpose fluid helps you lighten overly saturated colours, adjust deep tones, or revive inks that have thickened from evaporation — all while maintaining their original performance and vibrancy.

Unlike plain water, which can disrupt an ink’s chemical balance, this diluter matches the exact pH, viscosity and surface tension of high-quality fountain pen ink. The result is smooth, reliable flow and rich colour that stays true to the original formula. It also contains a powerful antimicrobial agent to prevent spoilage and ensure long-term stability. A reliable and essential tool for any writer or collector who values both performance and preservation in their ink collection.

Product features:

• Pprofessional-grade ink diluter and rehydrator.
• Maintains correct pH, viscosity and surface tension for consistent performance.
• Lightens dark inks or tones down highly saturated colours without altering hue.
• Revives inks that have thickened due to evaporation.
• Prevents feathering and bleed-through on paper.
• Includes a broad-spectrum antimicrobial agent for long-lasting freshness.
• Available in a 100ml bottle.