ARTEX Water-Based Rollerball Refill - 4-Piece Value Pack (German SCHMIDT Brand) - Black

**ARTEX Water-Based Rollerball Refills - 4-Piece Value Pack (German SCHMIDT Brand)** ■ Rich, consistent ink flow ■ Approximately 0.5mm tip size ■ Writing length of 1500M ±20% ■ Features Schmidt, a renowned German refill brand ■ Standard international size for easy replacement **Also available as a single purchase ►** https://www.pinkoi.com/product/Yy7fBmfD 【Refill 101: Q&A | Understand Refill Differences in Minutes】 Let's start with the most common types: ballpoint, gel, and rollerball pens. The key difference lies in the ink composition: oil-based, neutral, and water-based. These three distinct ink types create different writing characteristics. Refer to the following classification for ink types and pen names: **Ballpoint Pens ------ Oil-based or Neutral** **Gel Pens ------ Neutral** **Rollerball Pens ------ Water-based or Neutral** At this point, you might be wondering: **So, is a "neutral" ink considered a ballpoint or a rollerball?** Excellent question! Without getting lost in jargon, simply put, neutral ink combines the best of both oil-based and water-based inks. So, whether you call it a neutral ballpoint or a neutral rollerball? Both terms are used. To be more "professional," it's best to just call it a gel pen. For the same reason, our newly launched "hybrid oil-based" ink, which combines neutral and oil-based ink characteristics, we'll tentatively call a "hybrid oil-based rollerball." Alternatively, you can simply call it a "hybrid oil-based pen." **■ Characteristics of the 3 Ink Types:** https://live.staticflickr.com/65535/52063201128_1870b284ff_o.jpg ■ Viscosity affects how the paper absorbs the ink and the writing feel. The current market widely prefers neutral and water-based inks with low viscosity (but this doesn't mean oil-based refills are inferior; personal preference truly varies). ■ Writing length refers to how far a pen can write. Simply put, a longer length means you can write more.