Pearl-Ex Powdered Pigments, Non-tarnishing mica particles that offer a wide range of Metallics, Pearlescent and Interference colors. They may be incorporated into any viscous (slightly thick) medium such as paint, varnish, mediums or gels to produce a pearlescent or metallic luster. They may also be applied dry and then sealed or dusted on top of a tacky surface. Particle size is 6 to 50 microns. It is easily screenprinted, brushed or sprayed. Extreme colorfastness and stability. Ideal for interior, exterior or archival applications.