Perfect for adding stunning iridescent effects into prints Speedball Opaque Fabric Screen Printing Inks can be painted on with a brush or screen printed onto a range of textiles paper and cardboard. These inks offer greater opacity without sacrificing any workability or softness of the fabric and are ideal for use on dark fabrics. Speedball's Opaque Fabric Screen Printing Inks are washfast (when properly heat set) non-flammable and contain no solvents or offensive odour. Soap and water clean-up.