DecoArt Media Interference Fluid Acrylics are translucent colors that shift in color and appearance depending upon the light, viewing angle and color of the surface on which they are applied. When applied over a dark color you will see more opalescent color and less of the color shift. When applied over a light color you will see a sheer opalescent color but more of the color shift. Thin applications in a wash or glaze increase the visual interference effects. Dries to a water-resistant, satin finish Water-based, non-toxic formulas make for quick and easy clean-up. 1oz bottle.