Pearl Ex creates a metallic look without being a metal. The particles are flat platelets 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. It is a safe, non-toxic, inert powdered pigment with a neutral pH. It is extremely color fast and stable-it will not tarnish or fade and is therefore ideal for archival applications.