Otto Hutt fountain pens can be refilled with standard international-sized ink cartridges or with the ink converter originally provided with the pen and any brand of bottled ink.
Colorado Pen offers international-sized ink cartridges in 31 different colors. This specially formulated ink helps keep your Otto Hutt fountain pen writing smoothly.
If you still have your original ink converter, Colorado Pen has a large selection of bottled ink from which to choose. Our brand arrives in a huge 90ml bottle. Private Reserve offers standard ink or its premium specialized ink in multiple vibrant colors. Waterman bottled ink is offered in all the favorite colors.