18ml Invisible UV Fluorescent Ink for Dip & Glass Pens

Invisible UV Ink for Creative, Secure Writing

This 18 ml Non-Carbon Invisible UV Fluorescent Ink is designed for use with glass dip pens, metal dip nibs, and compatible fountain pens, delivering clean, reliable performance for both creative and security-focused applications. Under normal light the ink appears nearly invisible, while under UV/black light it reveals a bright fluorescent glow, ideal for discreet notes, decorative effects, and special projects.

Formulated without carbon pigments, this liquid ink helps reduce the risk of clogging fine nibs and is easy to clean from most non-porous pen surfaces. The 18 ml bottle offers a practical volume for repeated use in art, journaling, event stationery, and classroom or office activities. Use it on light-colored, uncoated papers for the clearest UV effect, whether you are writing, sketching, or adding hidden details to printed materials.

Why It's a Smart Choice

• Invisible in normal light - Stays discreet on the page until illuminated with a UV/black light, ideal for secret messages, marking, or subtle design layers.
• Bright fluorescent response - Produces a clear, readable glow under UV light, suitable for parties, events, crafts, and educational demonstrations.
• Non-carbon, pen-friendly formula - Designed to be gentle on glass dip pens and compatible fountain pens when used and cleaned correctly, helping maintain smooth ink flow.

FAQ

Q: Is a UV light included with the ink?
A: No. A separate UV or black light source is required to see the fluorescent effect.

Q: Can I use this ink in any fountain pen?
A: It is best suited to pens that can be fully disassembled and cleaned. Rinse thoroughly after use to avoid residue.

Q: On which paper does the ink work best?
A: Light-colored, uncoated paper provides the strongest invisible and UV-visible contrast.

Q: Is the writing completely invisible without UV light?
A: On most light papers it appears very faint or nearly invisible, but a slight trace may be visible depending on the surface and lighting.