This 4 ounce jar of Interference Blue Pearl-Ex Pigment by Jacquard is composed of powdered mica that can be added to any viscous medium for a metallic or pearlescent effect. Extremely versatile pearl-ex pigment is ideal for interior, fashion, fine arts and archival applications. These safe and inert pigments exhibit supreme colorfastness and will never tarnish or fade. Incorporate with other artist mediums including oils, acrylics, encaustics, wax, polymer clay or spread dry on a porous surface. Made in the USA.