Cosmenyl Blue A4R Cu Phthalocyanine Clariant Color pigment & dye >> Preparation Wood & Furniture Coatings >> Stains Cosmenyl Blue A4R is a pigment dispersion of approx. 38% pigment and is based on anionic dispersing and wetting agents and glycerine. The Colour Index of the basic pigment is Pigment Blue 15:1.Suitable for stationery, woodstains, latex, detergents and cosmetics. Cu Phthalocyanine. Used in wood stains.