Jacquard Pearl Ex is a safe, non-toxic, inert, powdered pigment that exhibits extreme colorfastness and stability. Ideal for interior and archival applications, it can be incorporated into any viscous medium, i.e. oil, acrylic, gouache, varnish, glazes, gels and clay or it may be spread dry on porous surfaces. Traditional artist colors can be mixed with Pearl Ex Pigments for special effects. Pearl Ex creates a metallic look without being a metal. It will not tarnish or fade. It is lightfast, inert, with a neutral pH. The Pearl Ex particle is a flat platelet with two surfaces, therefore it lays down beautifully like a thin coating of metal. The different particle sizes produce different looks from a fine, smooth, pearly luster to a highly metallic sheen.