Description Private Reserve Infinity Black fountain pen ink is a deep shade of black 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. Private Reserve Infinity ink is specially formulated with E.C.O. (Extended Cap Off Time formula) to not dry out in your pen, even uncapped for long periods of time. Under new ownership in 2021, Private Reserve Ink features bright, vibrant colors with excellent flow that tends to be quite wet. 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.