Speedball Flex Fabric Screen Printing Ink is an advanced water-based formula ink designed to be flexible across a variety of materials, whether white, light, or dark colour fabric. Ink delivers bold, rich colour and ideal for use on cotton, polyester, rayon, and synthetic fibers while resisting cracking or peeling when fabric is stretched or pulled. Fabric remains soft to the touch. The ink becomes permanent when properly heat set, and will maintain rich, vibrant colour for life of the garment. Create your own unique blend of colour by mixing the Flex ink. Uniquely formulated ink guarantees the highly opaque performance. Available in a variety of colours.