Fabric Screen Inks are water-based, non-toxic, and non-flammable. Suitable for T-shirts, tablecloths, etc. For use on cotton, polyester, blends, linen, rayon, and other synthetic fibers (NOT for use on nylon). Also works great on paper and cardboard! Easy clean-up with water. Wash fast when properly heat-set. Jars have inner seal. Contains no solvents with no offensive smell. AP Non-Toxic conforms to ASTM D-4236. Can be screen printed or painted on with brush. For best results, pre-wash fabric and always pre-test before production runs. Mix with Speedball Transparent Base for transparency and Speedball Retarder Base to slow drying. Inks must be properly heat set. After ink dries, use a paper or cloth interface and iron using a household iron at medium to high setting for 3 to 5 minutes on each side.