Liquitex High Viscosity Phthalo Blue is a high pigment, heavy, rich, creamy paint with a satin finish that truly captures the bright, crystalline Phthalo blue color. Phthalo blue has been used since the 1930s and is known for is strong tinting ability and light fastness. Liquitex HV Phthalo Blue dries quickly and is flexible when dry. Liquitex High Viscosity paints are perfect for the artist requiring texture, or a medium to show brush work. Liquitex High Viscosity paints are also extremely versatile and economical. Your Liquitex HV Phthalo Blue can be easily diluted for a watercolor effect, or mixed with any other Liquitex High Viscosity paints in order to find the perfect shade of blue for you. Liquitex High Viscosity paints are safe for educational use.