Matisse acrylic based inks come in 22 stunning, interchangeable colors-including metallics and irridescents. Matisse Acrylic Inks are water-resistant, which makes wet on dry techniques so much easier to control.They have bright, intense colors and are heavily pigmented for use in many applications. Matisse Acrylic Inks can be thinned with water, but this decreases the ink's water-resistance. To thin the ink and keep it water-resistant, the Matisse Ink Extender works best. Wet and semi-wet Matisse Inks are washable in water, making cleanup quick and easy. For dried Matisse inks, we suggest using the Matisse Ink Cleaner. Simply soak dirty equipment in Matisse Ink Cleaner, then wash up in warm soapy water to finish. Shake well for best results!