Speedball fabric block printing inks black 75ml tube eachnow you can block print onto fabric and wash it these speedball fabric block printing inks will print bold opaque colours they dry to the touch overnight but must be air dried for 7 days before they go in the washthe ink is oil based but non toxic and equipment can easily be cleaned with just soap and water its a win winsuitable for printing onto cotton polyester blends linen rayon and other synthetic fibres except nylon it