Speedball Fabric Screen Printing Inks are a water-based, non-toxic, non-flammable ink that offers artists vibrant colours that have a great coverage. These inks dry to a smooth matte finish and have a soft handle with a very easy clean up. All colours carry the AP Seal and are permanent on fabrics once properly heat set for 5 minutes with a hot iron. For best results, pre-wash fabric and always pre-test before production run. These inks can be mixed with Speedball Transparent Base for transparency and Speedball Retarder Base to slow the drying. Speedball Fabric Screen Printing Inks can be used on cotton, polyester, linen, rayon, fibreglass and other synthetic fabrics.