8 NEW COLOURS! Jacquard iDye Poly – these 16 dye colours for polyester fabric can be used on the stove top. Dyeing fabric has never been easier – iDye comes in a sachet that dissolves in water which means there is no handling of messy dye powders. Throw the dye sachet in, add salt and heat to boil. Each 14gm packet will dye up to 1.3kg of dry fabric, depending on the intensity of colour required.