Parker Quink Washable Ink Cartridges, Blue Ink, 4 X 5/Pack Cartridges keep ink contained so replacing it is a clean process, and are fitted with ink reserves ready to be released with a tap when pen is low. Permanent ink lays down smoothly, dries fast and won't smear. Suitable for use with all Parker fountain pens. Parker Quink inks are specially designed and formulated to the most exacting standards to ensure that Parker products deliver faultless performance.