Exclusive to Epson, DURABrite Ultra ink is a 4 colour pigment based ink technology that delivers ultra - sharp detail on plain and specialty papers. These fast drying inks deliver durable prints that are resistant to water, fading, smudging and is highlighter friendly too - ideal for professional business documents. With XXL size ink cartridges, you can print up to 4000 pages, that's 8 reams of paper without replacing the cartridge!