Parker Quink Washable Ink Fountain Pen Refill Cartridges, 10 Blue Ink Refills (3016031PP) (10 Cartridges, Blue) Parker refill cartridges are fitted with "ink reserves" ready to be released with a tap when a writer starts running on empty 10 Blue Ink Refills Designed to fit Parker Fountain Pens Cartridge keeps ink contained so replacing it is a clean process Ink permanent on paper, will wash out of clothing.