Fountain Pen Showdown: TWSBI ECO Edition! ✍️✨

Today we’re putting the clear TWSBI Eco to the test with two nib sizes and four gorgeous inks — because why compare one thing when we can compare everything? 😌

💎 Extra-Fine Nib

• TWSBI Red — bright, sharp, and crisp

• TWSBI Black — clean, precise, and perfect for tiny writing lovers

💎 Medium Nib

• Diamine Oxblood — deep, dramatic, and chef’s kiss

• Diamine Onyx Black — smooth, bold, and buttery

If you’ve ever wondered how much a nib size + ink combo can change the whole vibe, this is your sign to dive in!

Which pairing are you obsessed with?! 😆🖋️✨

#penaddict #fountainpen #stationary

2025/11/25 Edited to

... Read moreAfter spending some quality time with my TWSBI Eco, I wanted to share a deeper dive into my experience, especially comparing the Extra-Fine (EF) and Medium (M) nibs. When I first got into fountain pens, everyone talked about nib sizes, but experiencing the difference firsthand with the same pen body truly opened my eyes to how much it can alter your writing style and ink performance. Let's talk about the Extra-Fine nib first. In my hands, this nib provided incredible precision. It's fantastic for those who write small, need to fit a lot of notes into tight spaces, or enjoy intricate sketching. The TWSBI Red and Black inks, when paired with this EF nib, came out crisp and sharp, just as described. However, I have to be honest: the Extra Fine nib can feel a little scratchy to me at times, especially if I'm not using particularly smooth paper or a very wet ink. It's not a deal-breaker, but it's something to consider if you prefer a buttery-smooth glide right out of the box. For me, it's a trade-off for that pinpoint accuracy. Switching over to the Medium nib was like writing with a completely different instrument. This nib writes more smoothly, almost like butter, across the page. The broader line allows inks to express more of their characteristics, like shading and sheen, which I absolutely adore. The Diamine Oxblood, with its deep and dramatic tones, looked absolutely incredible with the Medium nib, showcasing its full richness. Similarly, the Diamine Onyx Black appeared incredibly smooth and bold. If you're looking for a pen that glides effortlessly and lets your inks truly shine, the Medium nib is a fantastic choice. It's perfect for journaling, signing documents, or just enjoying a more relaxed writing experience. Beyond the nibs, the TWSBI Eco itself is a marvel, especially for its price point. It’s a demonstrator pen, meaning you can see the ink sloshing around inside, which is endlessly fascinating to me. The piston-filling mechanism is robust and holds a generous amount of ink, making it ideal for long writing sessions without frequent refills. Plus, the ability to fully disassemble it for cleaning is a huge bonus for any pen addict who loves to switch inks frequently. So, which nib size is for you? If precision and tiny writing are your priorities, the Extra Fine is a solid contender, just be mindful of potential feedback. If you crave a smooth, effortless writing experience and want to see your inks' full glory, the Medium nib is likely your best bet. My advice? Experiment! Try different inks with each nib. You might find that a wetter ink makes the EF feel smoother, or a drier ink helps control a broad M nib on cheaper paper. Ultimately, the best nib is the one that brings you the most joy and comfort in your daily writing. What's your favorite nib size? I'm always curious to hear what other fountain pen enthusiasts prefer!

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