Orange Jacquard Synthetic iDye Fabric Dye with Colour IntensifierVibrant Colour Dye for Synthetic FabricsiDye Poly is virtually the only dye that will colour polyester. It will colour almost anything synthetic, including plastics and nylons, buttons, frisbee discs, Worbla & Thibra, 3d printed objects, toys, dolls, wigs, cleats, urethane coatings and more. The dye comes in a dissolvable packet, so there are never any messy powders to handle: drop the packet in a pot of water, add the fabric or objects and bring to a simmer.Jaquard iDye Poly is an industry-leading synthetic fabric dye trusted by crafters worldwide.For blended fabrics containing synthetic and natural fibers, use iDye for Natural Fabrics with the corresponding iDye Poly colour AT THE SAME TIME! Or try pairing two different colours for interesting, two-tone heather effects. iDye Poly may also be used for sublimation transfer techniques and to dye the polyester threads used to sew many commercially manufactured garments.