What kind of fabrics do you use when you do the Iron_On embroidery patterns? I picked up 5 Aunt Martha's Hot Iron Transfers from Joann's yesterday. I couldn't resist, they were $1.99 each. I thought I'd use them for some random things when quilting, but mostly when I do labels and stuff. Can they be used on any fabric? Should the fabric be solid colored or can it have a light print on it? I'm just curious.