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. Washable ink lays down smoothly, dries fast and won't smear. Innovative 5th technology combines the best aspects of fountain and roller pens and adjusts intuitively to your writing style in just a few words. Parker Quink inks are specially designed and formulated to the most exacting standards to ensure that Parker products deliver faultless performance.