Description Graf von Faber-Castell Midnight Blue fountain pen ink is a deep, dark shade of blue-black. The cardboard box contains 6 standard short international size cartridges that will fit most fountain pens that accept international cartridges. Graf von Faber-Castell fountain pen ink is made in Germany, and has good flow and vibrant colors. This Graf von Faber-Castell fountain pen ink is water-resistant, UV-resistant, and resistant to certain chemicals and solvents. Please note that these cartridges will not fit in pens that use proprietary cartridges. For a more in-depth look at this ink color, check out our thINKthursday blog post! 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.