An acrylic medium formulated with mica, which can be mixed with acrylic colors to create an iridescent lustre or applied by itself for a silvery iridescent effect. Gloss Medium extends the colors, increases their fluidity and transparence, and softens the blending of brushstrokes. It heightens the flexibility of the colors, and their adhesion to the surface. Does not yellow or change tonality of the color. Can also be used as a binder for dry pigment. .