This is so easy to use - just open the bottle and paint. Iron fix or use Jacquard Airfix. Lovely results ever time - ideal for children and beginners. Dye-Na-Flow is a free flowing versatile concentrated liquid couler for use on any untreated fabric. It will spread on fabric until it is thoroughly absorbed and even. Every fabric gives a differnt flow and spred, but works well on eny type of fibre, natural and synthetic. On silk it has an even lustre, on velvet it is rich, on cotton the colour does not alter the feel of the fabric.