Fluorescent fountain pen inks add a glowing effect to your writing, making them stand out under UV-A light (blacklight). These inks come in two main types: neon inks, which are vibrant in daylight and glow even more under UV, and invisible UV inks, which are invisible in normal light but glow under blacklight. They're perfect for hidden messages, art, calligraphy, and highlighting. Here's a quick look at the top options:
- Tono & Lims Star Light Line: Specially made for fountain pens, these inks offer visible neon colors and invisible UV-reactive options. Works best with wet nib sizes on premium paper.
- Octopus Fluids Barock Neon Yellow: A pigmented, vegan ink that doubles as a highlighter. Bold, durable, and waterproof.
- Octopus Fluids Barock Neon Green: Bright under UV, this eco-friendly ink is great for annotations and mixed media.
- Octopus Fluids Barock Neon Pink: Always visible and highly reactive to UV, this ink is document-proof and quick-drying.
- Octopus Fluids Barock Neon Orange: Warm and vibrant, it glows strongly under UV and dries fast for smudge-free use.
Quick Comparison
| Ink | UV Glow Intensity | Drying Time | Saturation | Best Use |
|---|---|---|---|---|
| Tono & Lims Star Light Line | Very strong | 30–50 sec | High | Creative writing and hidden messages |
| Octopus Fluids Barock Neon Yellow | Strong | Under 15 sec | High | Highlighting and calligraphy |
| Octopus Fluids Barock Neon Green | Strong | Under 15 sec | High | Precise annotations and mixed media |
| Octopus Fluids Barock Neon Pink | Strong | Under 15 sec | High | Highlighting and detailed work |
| Octopus Fluids Barock Neon Orange | Strong | Under 15 sec | High | Fast-paced tasks and annotations |
These inks are best paired with ivory or cream-colored paper to enhance their glow. Regular pen cleaning is essential, especially for pigmented inks, to prevent clogging. Whether you're creating art, journaling, or marking documents, these inks bring a glow to your work.
Top 5 Fluorescent Fountain Pen Inks Comparison Chart
Tono & Lims Fountain Pen Ink Taking Over Japan!
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1. Tono & Lims Star Light Line Fluorescent Inks
The Tono & Lims Star Light collection brings something special to fluorescent ink fans, particularly those who love fountain pens. While many fluorescent inks are designed solely for dip pens, this line stands out as one of the rare water-based options specifically formulated for fountain pen use. You can grab a 30 ml bottle for $24.00, or try a 4 ml sample for about $6.50.
Fluorescence Intensity Under UV Light
These inks are designed to shine - literally - under UV-A light. The collection includes two types of fluorescent inks: visible fluorescent colors that mimic the brilliance of stars (referred to as alpha stars) and clear UV-reactive inks like "Moon" and "Universe." The latter are invisible under normal light but glow vividly under UV, making them perfect for writing hidden messages or creating unique effects.
Saturation Levels
Saturation varies across the collection, offering a range of visual effects. For instance, the color E=mc2 is less saturated compared to others in the line. Its transformation is fascinating - it starts as a wet gray and dries into a dusky green. Similarly, Regulus shifts from blue to teal as it dries. These inks generally have low shading and no sheen or shimmer, keeping the focus on their core color and fluorescent glow.
Fountain Pen Compatibility
When choosing a fountain pen for these inks, the Star Light inks perform best with pens that have wetter nibs, as the inks tend to have a dry flow. On premium papers like Rhodia, Tomoe River, or Leuchtturm, you’ll see no feathering or bleeding, ensuring a clean and vibrant writing experience. However, on standard 24 lb copy paper, feathering and bleeding are significant. Water resistance is moderate at best, so keep that in mind if durability is a concern.
2. Octopus Fluids Barock Neon Yellow
Octopus Fluids Barock Neon Yellow is a pigmented ink designed as a fountain pen–friendly alternative to disposable highlighters. Made in Dresden, Germany, this ink comes in a 30 ml bottle priced between $14 and $19. It's 100% vegan and crafted in small batches to ensure consistent quality. Its versatility makes it a hit with both artists and fountain pen enthusiasts who value sustainability and precision.
Fluorescence Intensity Under UV Light
This ink shines brightly under UV-A light, giving it a striking glow under blacklight. Thanks to its pigments, it delivers vivid color saturation and intense luminosity that stands the test of time. Unlike typical highlighter inks, its durability and opacity make it ideal for professional use in painting, drawing, and calligraphy.
Saturation Levels
The ink's high saturation ensures a bold, vibrant yellow on paper. However, traces of dark ink in your pen can slightly alter its neon effect, sometimes adding a greenish tint. This often happens if a pen previously used blue ink and wasn't cleaned thoroughly. To maintain the ink's true color, always clean your pen carefully before switching to this ink. Its strong saturation also enhances its performance with fountain pens.
Fountain Pen Compatibility
Octopus Fluids Barock Neon Yellow performs seamlessly with a variety of fountain pen setups. Whether you're using piston-based or converter-equipped pens, this ink works well with glass nibs, calligraphy nibs, and brushes. For highlighting large sections, wide or stub nibs are best, while fine nibs are great for detailed annotations (use a nib size calculator to find your match). Since this is a pigmented ink, it's crucial to clean your pen immediately after use to prevent the ink from drying inside. A specialized cleaner for pigmented inks is recommended for this.
Drying Time
Once dried, this ink becomes document-proof - waterproof, lightfast, and resistant to erasing. While exact drying times aren't specified, the formula is designed to perform well on delicate surfaces like thin Bible paper and legal documents without bleeding or fading. It also works effectively over fully dried royal blue ink or printed text, making it a practical choice for mixed-media projects.
3. Octopus Fluids Barock Neon Green
Octopus Fluids Barock Neon Green is a pigmented, vegan ink crafted in Dresden, Germany. Sold in a 30 ml bottle for around $14, it offers an eco-friendly, plastic-free alternative to disposable highlighters. It's especially suited for precise annotations on legal documents and delicate pages like those in Bibles.
Fluorescence Intensity Under UV Light
This ink shines brilliantly under blacklight, delivering a strong and vibrant glow. Unlike many fluorescent inks, Barock Neon Green is document-proof - meaning it’s waterproof, lightfast, and resistant to erasers once dried. Its pigment-based formula keeps the green vivid and long-lasting. However, to maintain its fluorescence, thoroughly clean your pen before refilling. Leftover dark ink from previous use can reduce its brightness and weaken the neon effect.
Saturation Levels
The ink's high saturation ensures a bold and vivid green on paper. When applied over dried royal blue ink or printed text, it does not significantly obscure the underlying writing, even with heavy application. This makes it an excellent choice for mixed-media projects or annotating documents without compromising readability.
Fountain Pen Compatibility
Barock Neon Green performs well in piston fountain pens and pens with converters from brands like Pelikan, Kaweco, Faber Castell, Caran d'Ache, and Visconti. It’s also compatible with glass nibs, calligraphy nibs, and brushes. To avoid clogging, clean your pen immediately after use with a pigmented ink cleaner. Never allow the ink to dry inside your pen, and if you store a filled pen unused for more than two weeks, be sure to empty and clean it beforehand.
Drying Time
This ink dries in under 15 seconds, making it highly practical for daily use. Its quick-drying nature ensures smudge-free performance, allowing you to highlight or annotate without worrying about transferring ink when turning pages. Once dry, the ink becomes permanent, offering resistance to water, light, and erasers. This durability makes it ideal for archival-quality documents and creative projects like painting, drawing, and calligraphy. The fast-drying performance is a standout feature of the Octopus Fluids Barock line, as we move on to explore the next color in the series.
4. Octopus Fluids Barock Neon Pink
Octopus Fluids Barock Neon Pink is a pigmented, vegan ink crafted in Dresden, Germany. Priced at around $14 for a 30 ml bottle, it offers an environmentally friendly alternative to disposable plastic highlighters. Ideal for tasks requiring precision, such as marking legal documents or religious texts, this ink ensures accuracy without the broad strokes of traditional felt-tip markers.
Part of the Octopus Fluids Barock series, Neon Pink stands out with its vibrant color and reliable performance.
Fluorescence Intensity Under UV Light
This ink is a showstopper under UV light, glowing brilliantly while maintaining its bold pink shade in regular lighting. Unlike invisible UV inks, which only appear under blacklight, Barock Neon Pink is always visible and reacts intensely when exposed to UV. It’s also document-proof - waterproof, lightfast, and resistant to erasure once dry - ensuring the color remains bold and doesn’t fade over time.
Saturation Levels
With high color saturation, this ink delivers consistent vibrancy, stroke after stroke. Even when applied over dried royal blue ink or printed text, it minimally affects the underlying material, making it perfect for highlighting and annotating without obscuring critical information. This balance of saturation and clarity makes it a reliable choice for detailed work.
Fountain Pen Compatibility
Barock Neon Pink is compatible with a variety of fountain pens, including piston and converter models from brands like Pelikan, Kaweco AL Sport, Faber Castell, Caran d'Ache, Diplomat, Montegrappa, Rotring, Schneider, Visconti, and Tombow. It also works beautifully with glass nibs, calligraphy nibs, and brushes.
To maintain optimal performance, clean your pen immediately after use with a cleaner designed for pigmented inks. Never let the ink dry inside your pen, as this could cause clogging. For the best fluorescence, clean your pen thoroughly before filling it with this ink - any residual dark ink can dull its vibrant glow under UV light. When stored properly in a sealed container, the ink has a shelf life of at least two years.
5. Octopus Fluids Barock Neon Orange
The Barock series gets a vibrant twist with Neon Orange, offering a bold and warm addition to the lineup.
Octopus Fluids Barock Neon Orange is a pigmented, vegan ink made in Dresden, Germany. At $14 for a 30 ml bottle or $4.50 for a 4 ml sample, it serves as an eco-friendly replacement for disposable highlighters. This ink is document-proof, meaning it’s waterproof, lightfast, and resistant to erasers once dry - perfect for marking legal documents, religious texts, or any material where durability is key.
Fluorescence Intensity Under UV Light
Under UV light, this ink shines with a striking glow, making it ideal for UV-specific projects. Artists can use it for painting, drawing, or professional calligraphy. To maintain its brightness, ensure your pen is thoroughly cleaned before filling it with this ink.
Drying Time
The ink dries quickly, minimizing smudges and ensuring clean, precise marks. This is especially helpful for fast-paced tasks like annotating or underlining small text, where accuracy matters. Its quick-dry formula also prevents blurring, even during rapid work.
Saturation Levels
With high saturation, this ink retains its vividness even when applied over dried royal blue ink or printed text. It highlights text clearly without obscuring the details, maintaining its bold intensity from the first stroke to the last.
Fountain Pen Compatibility
Barock Neon Orange works seamlessly with piston fountain pens, converter models (compatible with brands like Pelikan, Kaweco, Faber Castell, Caran d'Ache, Diplomat, Montegrappa, Rotring, Schneider, Visconti, and Tombow), as well as glass nibs, calligraphy nibs, and brushes. Since it’s a pigmented ink, it’s crucial to clean your pen immediately after use with a pigmented ink cleaner to prevent clogging.
Comparison Table
The table below gives a clear overview of the standout features for each ink option:
| Ink | UV Glow Intensity | Drying Time | Color Saturation | Best Fountain Pen Compatibility |
|---|---|---|---|---|
| Tono & Lims Star Light Line Fluorescent Inks | Highest – remains visibly glowing even on highly reactive paper | 30–50 seconds | High – maintains brightness across paper types | Compatible with extra fine to broad nibs in both piston and converter models |
| Octopus Fluids Barock Neon Yellow | Strong – best on ivory/cream papers | 30–50 seconds | High – vivid color without obscuring text | Compatible with piston and converter models (e.g., Pelikan, Kaweco, Faber Castell), glass and calligraphy nibs |
| Octopus Fluids Barock Neon Green | Strong – best on ivory/cream papers | 30–50 seconds | High – bold intensity from first to last stroke | Compatible with piston and converter models, glass and calligraphy nibs |
| Octopus Fluids Barock Neon Pink | Strong – best on ivory/cream papers | 30–50 seconds | High – clear highlighting without obscuring details | Compatible with piston and converter models, glass and calligraphy nibs |
| Octopus Fluids Barock Neon Orange | Strong – best on ivory/cream papers | 30–50 seconds | High – retains vividness over dried ink and printed text | Compatible with piston and converter models, glass and calligraphy nibs |
This table underscores the unique qualities of each ink, making it easier to choose the right one for your creative projects.
The Tono & Lims Star Light Line Fluorescent Inks shine brightest in terms of UV glow, staying visible even on highly reactive bright white paper. All five inks are suitable for standard fountain pens, accommodating nibs from extra fine to broad. For the best results, especially if you're aiming for maximum UV glow, opt for ivory or cream-colored papers like Midori MD or Tomoe River. These papers enhance the inks' glow, unlike bright white papers with UV-reactive bleaching agents, which can diminish the effect.
Conclusion
Fluorescent fountain pen inks add a whole new dimension to creative projects, offering vivid visual effects that traditional inks simply can't match. These inks are formulated with special agents that react to ultraviolet light - whether from sunlight, fluorescent lamps, or UV black lights - making colors appear exceptionally bright and intense. Under UV black light, they even glow, introducing a hidden or interactive element to artwork, journaling, or security markings.
Their adaptability makes them suitable for a variety of uses. Thanks to their balanced formula, these inks flow smoothly while maintaining a rich, vibrant appearance. Whether you prefer bold, eye-catching hues or subtle UV-reactive tones, these inks open up new possibilities for creative expression.
"Good ink helps make the act of writing a fun experience in itself. Writers who can find ways to make the practice of writing more rewarding have a better chance of establishing a long-term habit of daily writing." - Goldspot Pens
To keep pens like the LAMY Vista performing at their best, regular cleaning is a must.
From the glowing brilliance of Tono & Lims to the deeply saturated shades of the Octopus Fluids Barock series, these inks turn writing into an artistic experience. Whether you're journaling, creating intricate designs, or just want your writing to stand out, fluorescent inks bring a touch of magic to the everyday act of putting pen to paper.
FAQs
Which fluorescent ink is safest for everyday fountain pen use?
Diamine fluorescent inks are a popular choice for fountain pen enthusiasts because they are safe for everyday use. These inks are non-toxic and water-based, ensuring they are gentle on your pens while being ideal for regular writing tasks.
What UV light do I need to see these inks glow?
To make fluorescent fountain pen inks glow, you'll need a UV-A light with a wavelength of about 365nm. This specific wavelength works perfectly with UV-reactive inks and is generally considered safer compared to other parts of the UV spectrum.
How do I keep pigmented neon inks from clogging my pen?
Keeping your fountain pen in top shape means regular cleaning. Here’s how you can do it:
- Disassemble the pen: Take apart the nib, feed, and converter to clean each component thoroughly.
- Flush with distilled water: Use lukewarm distilled water and a bulb syringe to rinse out ink residue.
- Deal with stubborn buildup: For dried ink or tough residue, soak the parts in a solution of mild dish soap or use a specialized pen flush.
Aim to clean your pen every 1–2 weeks. When not in use, store it with the nib pointing upward and rotate your pens regularly to reduce the chance of particles building up. These simple habits can keep your pen writing smoothly for years to come.