Speedball - Permanent Acrylic Screen Printing Ink - 1 gallon - Ultra Blue - Speedball presents a high-quality Acrylic ink for Screen Printing! This permanent screen printing ink comes in 19 brilliant colors, and can be used on paper, wood, or cardboard. May be screen printed or painted on with a brush. Speedball Acrylic Screen Printing Ink has archival qualities, is non-flammable, and contains no solvents. Certified AP non-toxic.