Pen Hahnemühle Signing Pen Duo 10640475 — black water-resistant ink

Hahnemühle Signing Pen Duo with black water-resistant ink is designed for durable signatures and archival annotations on paper and similar media. The pen delivers a consistent black line that resists moisture and light smudging during normal handling. It is built to provide reliable performance for documents, certificates, forms and other items that require long-lasting, legible markings.

Advantages

The pen provides water-resistant black ink formulated to reduce feathering and preserve clarity over time. Its ink flow is engineered for smooth, even writing suitable for signatures and handwritten notes. The construction supports extended use and consistent stroke width, offering dependable performance for both single signatures and repeated writing tasks.

Suitable for

• Signing contracts, certificates and official documents
• Archival notes and annotations on paper-based records
• Forms, labels and administrative paperwork requiring durable marks
• Personal correspondence and journaling where water resistance is preferred

Key specifications

• Ink color: black
• Ink property: water-resistant
• Tip type: fine writing point suitable for signatures and notes
• Suitable media: paper and similar porous surfaces
• Intended use: signing and archival marking

How to use

Store the pen capped when not in use to prevent drying. For best results, write at a steady angle and allow a few seconds for the ink to set before touching or stacking pages. Test on a spare sheet if working on coated or non-standard paper. Replace the pen when ink flow diminishes or writing becomes faint.

Usage recommendations

For archival quality, use on clean, dry paper and avoid exposure to direct water after writing; handle signed documents by the edges until the ink has fully set.