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 delivery durable prints that are resistant to water, fading, smudging and is highlighter friendly too – ideal for professional business documents. With XL size black cartridges, you can print up to 2600 pages, that's 5 reams of paper without replacing the cartridge