The sophisticated dark ink colors in Uni-ball's Jetstream RT BLX pens are subtle but catch attention for their uniqueness. These intriguing inks are created by infusing black ink with color. They dry quickly and are smear-resistant, which is great especially for left-handers. Writing is a smooth experience, and the lines are crisp. The pigment-based ink is acid-free, water-resistant, fade-resistant, and of archival quality. The pen is stylish with a dark barrel and sleek stainless steel accents.