Most pen ink is not waterproof, especially common fountain pen inks.
Why Most Pen Inks Aren't Waterproof
Most fountain pen inks are water-based, meaning the color pigments or dyes are dissolved in water. When exposed to water, these inks tend to dissolve and smear, leading to a ruined document or artwork.
When Pen Ink Is Waterproof
However, there are waterproof pen inks available. These inks contain special components that make them resistant to water. These inks typically fall into these categories:
- Pigment-based Inks: Instead of dyes, these inks use tiny, insoluble pigment particles that bind to the paper fibers, making them more water-resistant.
- Iron Gall Inks: These are historical inks that react with the paper to create a permanent, waterproof bond. Modern versions are formulated to be safer for pens.
- Acrylic Inks: These inks contain acrylic polymers that create a waterproof layer when dry.
Determining if an Ink is Waterproof
- Read the Label: The ink bottle or packaging should explicitly state if the ink is waterproof or water-resistant.
- Test the Ink: Apply some ink to paper and let it dry completely. Then, gently wet the ink with a damp cloth or water droplet and observe if it smears or dissolves.
- Check Online Reviews: See what other users say about the ink's water resistance.
Example of Waterproof and Non-Waterproof Inks
| Ink Type | Waterproof? | Notes |
|---|---|---|
| Standard Fountain Pen Ink | No | Likely to smear with water |
| Noodler's Bulletproof Black | Yes | A popular waterproof fountain pen ink |
| India Ink | Yes | Known for its permanence, often used for drawing |
Conclusion
While most fountain pen inks are not waterproof due to their water-based nature, waterproof options do exist, particularly pigment-based, iron gall, and acrylic inks. Always check the product information or conduct a test to determine water resistance.
