Description A 60ml bottle of Platinum Blue-Black fountain pen ink, with a built-in reservoir for easy filling of your fountain pen. Platinum Blue-Black fountain pen ink is a rich shade of blue-black that leans towards blue. 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 $50 for US customers, and for orders over $250 for our Canadian customers.