I think a couple people who responded are confusing the fusible interfacing with the paper backed fusibles used for applique. I have used this technique many times -- Quilt Smart has a whole line of great patterns using printed fusible interfacing. It is a great way to achieve precise shapes, projects. I've done 2 or 3 lone Stars using the quilt smart interfacing, and the game quilts are wonderful. Choose a lightweight fusible interfacing. Visit the quilt smart website they have some hints & tips that might help. I don't know what your project is so can't help to explain the process. But, with the lone stars or the water color quilts you line the pieces up on the interfacing, press them then fold & stitch.