With the growing interest in fountain pen inks over recent years, the variety of ink colors is also increasing. Platinum Pen has developed a new ink that is the blackest ink in its 104-year history. The new ink offers excellent visibility with a clean and intense black color, allowing you to preserve memories and records on paper. Moreover, it prevents ink penetration into the paper and is highly water- and wear-resistant after use, making it ideal for writing letters, diaries, and other texts you want to last a lifetime. Enjoy the true black color like never before.

When cleaning the pen nib after using Chou Kuro ink, use clean water available at pharmacies, etc. Avoid washing with tap water as it reacts with the metals contained and makes stain removal difficult.