Since dye-based ink contains water-soluble colorant, the colorant dissolves when coming in contact with water. With the Epson Stylus CX4700's Epson DURABrite Ultra pigment ink, every ink particle is encapsulated with a soft yet extremely strong a protective resin. The results are prints with superb water-resistance to spills, humidity, and the moisture introduced by using highlighter pens and daily handling.