1 Sheet Mylar Hotfix Transfer Paper approx 20 x 30cm (roughly A4). Mylar paper is heat resistive transparent and self adhesive film supplied on a peel off backing paper. Used to hold crystals in place to allow a design to be positioned temporarily stuck into place then ironed through. The paper is peeled off once cooled. There are two methods. Trim your sheet to overlap the design by approx 2cm. Layout the crystals glue side down onto a sketch of the design then carefully press the Mylar sticky side down onto the tops of the crystals. The pattern can then be lifted off the sketch to the final position ready for ironing. Alternatively lay the Mylar sticky side up over the sketch then add the crystals upside down into position as before once complete lift the entire design into final position. Trim your sheet to overlap the design by approx 2cm.