Refill cartridges are fitted with “ink reserves” ready to be released with a tap when a writer starts running on empty. Dye based ink is permanent on paper, but will wash out of clothing. Receive high-quality ink when you buy Parker pen refills. Refill Format: International Fountain Pen Cartridge; Refill for Series: Parker Washable Ink Fountain Pens; Refill Ink Color: Blue; Color Family: Blue.