ARTEX Water-Based Gel Pen Refill (German SCHMIDT Brand) Black

**ARTEX Water-Based Gel Pen Refill (German SCHMIDT Brand)** ■ Rich, vibrant color with smooth ink flow ■ Approximately 0.5mm tip size ■ Writing length of 1500M +/- 20% ■ Features Schmidt refills, a renowned German brand ■ Standard international size for easy replacement **Save more with our 4-pack bundle offer ►** https://www.pinkoi.com/product/NsrbJCv3 【Refill 101: Understanding the Differences】 Let's start with the most common types: ballpoint, gel, and rollerball pens. The key difference lies in their ink composition: oil-based, neutral, or water-based. Each ink type offers distinct writing characteristics. Here's how ink types generally correspond to pen names: **Ballpoint Pen ------ Oil-based or Neutral Ink** **Gel Pen ------ Neutral Ink** **Rollerball Pen ------ Water-based or Neutral Ink** You might be wondering: **So, is a "neutral" ink considered a ballpoint or a rollerball?** That's a great question! To put it simply, since neutral ink combines the best features of oil-based and water-based inks, it can be referred to as a neutral ballpoint or a neutral rollerball. Both terms are used, but "neutral pen" is the more professional designation. Similarly, our newly introduced "hybrid oil-based" ink combines neutral and oil-based characteristics, so we'll tentatively call it a "hybrid oil-based rollerball pen," or you can simply call it a "hybrid oil-based pen." **■ Features of the 3 Ink Types:** https://live.staticflickr.com/65535/52063201128_1870b284ff_o.jpg ■ Viscosity affects how the paper absorbs ink and the writing feel. The current market trend favors neutral and water-based inks with lower viscosity (though this doesn't mean oil-based refills are inferior; preference is truly subjective). ■ Writing length indicates how far a single pen can write. Simply put, a longer writing length means you can write more.