I have a couple of the hankies that my Grandma made & used. I was planning on folding them like butterflies & appliqué ing them on to a quilt. They are very thin also & if I were using them more like a block in the quilt they would need something to make them more durable. I'm not sure I'd want to iron anything on to them. I don't know the answer so I'll be looking here for suggestions.