Hyatts Iridescent Medium produces a range of iridescent or metallic colors when mixed with acrylic paints. Opaque when wet, the medium becomes transparent when dry. As more Iridescent medium is added the color will become more transparent. Designed for use with acrylic paints, Hyatts Iridescent Medium can also be used on its own. This medium is great for creating pearlized colors and can be layered for a wide variety visual effects. A great value, this medium is perfect for students and beginners alike. Add a little shimmer and shine to work today! One 8 oz bottle.