Liquitex Iridescent Medium adds richness to acrylic colours by creating a metallic/pearlescent effect. Gives a smooth iridescent appearance Increases paint transparency Extends your color without affecting acrylic stability Slows drying time to help you create more subtle color blends Lowers the viscosity of heavier body paints Maintains paint adhesion, durability and archival quality How to use Fully intermixable with all Liquitex products Can be thinned by diluting with up to 30% water Distilled water will give best results Mix as much as you like into acrylic color to create the iridescence and viscosity you want Stir gently to avoid creating foam  if bubbles appear, leave it to sit while the bubbles rise and disappear -Do not shake or vigorously over brush as this can result in a foggy, hazy look when dry May temporarily lighten colors until dry Do not use with any non-acrylic media