Speedball Fabric Block Printing Ink will help you create gorgeous prints on both fabric and paper. With a wide variety of bold, opaque colours to choose from, youll always have a colour for every project. It will work great on cotton, polyester, linen, rayon and other synthetic fibres (not for use on nylon). This block printing ink really pops when you use it on paper and cardboard too. Speedball Fabric Block Printing Ink requires no heat set to get a permanent result! Simply let your project dry overnight and it will be dry to the touch in the morning. Allow one week before washing. Easy clean-up with soap and water. The Speedball Fabric Block Printing Ink is safe for adults and children to use. It is certified ACMI AP Non-Toxic and conforms to ASTM D-4236.