Speedball Fabric Block Printing Ink Permanent results with no heat-set required!* Love creating unique designs on fabric but hate heat-setting? Then Speedball's Fabric Block Printing Inks are for you! Made from a water-miscible, oil-base, these inks print with bold, opaque color and maintain a soft hand. BOLD OPAQUE COLORS – A color for every project! USE ON FABRIC & PAPER – This versatile block printing ink creates beautiful results on both fabric and paper. Use on cotton, polyester, linen, rayon and other synthetic fibers (not for use on nylon). NO HEAT SET REQUIRED - Allow prints to cure for 7 days before laundering. QUICK, EASY CLEAN-UP – There is no need for smelly solvents or harsh chemicals. Ink cleans up easily using soap and water ACMI AP CERTIFIED – All colors cary the AP Seal.