Speedball acrylic inks are water-based, nontoxic, highly opaque inks for signs, posters and fine art prints. Use them for printing on paper, posterboard and wood. Do not use on metal, plastic, or fabrics that are to be laundered. These inks are ideal for for screen printing or painting on with a brush. They clean up easily with water and contains no solvents. They air dry quickly and provide a vibrant, glossy look on paper. Available in Purple.