Jacquard iDyes has a range for poly or man-made fabrics (iDye Poly) and a range for natural fibres - sold seperately. Jacquard iDyes dye 1.3kg of dry fabric, which is almost 4 times more than other brands! iDye Poly iDye Poly is for SYNTHETIC FIBRES  such as polyester and nylon. It even works on some plastics buttons, frisbee discs, 3D printed objects, dolls and more! The dye comes in a dissolvable packet, so there are never any messy powders to handle: simply drop the packet in a pot of water, add your fabric and bring to a boil! iDye Poly may also be used for sublimation printing techniques and to dye the polyester threads that are used to sew commercially manufactured garments. For use with: polyester, nylon, poly/cotton blends*, plastics & more Instructions for iDye Poly