Bring shine to your artwork by adding luster with this Iridescent Medium from Winsor and Newton. Pearlescent particles add metallic effects to watercolor which is particularly effective when mixed with transparent colors - especially over dark backgrounds. Mix with transparent watercolor or apply over a dried wash. Shake well before use.Details:Clear2.54 fl. oz. (75 mL) bottle size6 bottlesAdds soft reflective grainBrightens watercolor slightlyStrongest effect mixed with transparent colorsPearlescent effect stands out best on dark papersAlso usable on top of dry colorsRecommended for use with watercolor paints