Description Platinum Chou Kuro fountain pen ink is the blackest ink ever created from Platinum in its 104-year history that comes as a 3ml sample in a plastic vial with a dip at the bottom to allow you to easily get every drop, labeled with the name of the ink brand and color. Platinum Chou Kuro ink is blacker than black, and 46.8% darker than Platinum's famous Carbon Black, making this new permanent ink from Platinum the color to set the new standard of what is possible from permanent black ink in the fountain pen market. Platinum ink is made in Japan and is very popular for its consistent performance. Having trouble deciding between colors? Use our Ink Comparison Tool to quickly and easily view different colors side by side. We offer Free Shipping on all orders over $59 for US customers, and for orders over $250 for our Canadian customers.