Holbein Iridescent Medium allows you to make all of Holbein's 100+ colors into shiny iridescent shades! Ever wished for a metallic Prussian Blue or a shimmery Brilliant Pink? With this little bottle, you can have them at your fingertips. The medium is thick and very shiny; photos don't really do it justice because it looks different as you move it around and change the angle of light reflecting from it. You can use just a little for a subtle shine in more realistic work, or go nuts (like we did in our example photo) and make it really sparkle.