Splash Ink is designed to make mixing color a breeze. This acrylic mixing medium contains the four colors of a printing cartridge (cmyk) and comes with a handy mixing chart to help you create a wide variety of colors. The consistency is thin, so you don't have to water it down to allow it to flow nicely through a nib. Once it dries, it's permanent. Ideal for creating lovely backgrounds. Four 1 oz. bottles.