Ultra-fluid acrylic with lightfast, artist-quality pigments. No dyes. No fade. Just pure, permanent color. And like all acrylics, it dries quickly. A deep dark blue transparent color, that recreates the appearance of Prussian blue pigment. Prussian blue was the first known artificially manufactured color and was made by the colormaker Diesbach of Berlin in the early 1700s when experimenting with the oxidation of iron Lightfastness: Excellent Opacity: Transparent