Step 4: Burning the details
Plug in and heat up your soldering iron.
Starting at the tip, burn a short line (1/16 to 1/8 inch) on the edge of the leather heart. Spacing as evenly as you can roughly the same 1/16 to 1/8 inch.
Carefully trace the marks between the top of the heart and the extra flap of leather, continuing the design.
Run your soldering iron around the edges of the heart, this will help seal the leather as well as clean up the shape.
Words, pictures or designs can be added to the center or it can be left as is.