Blank Iron-On Clothing Labels | No Sew Laundry Safe Labels - Label Land Place label on garment in desired position. Put a pressing cloth (very thin piece of fabric) over the label. Holding the iron flat, firmly press the labels in place for 15 seconds. DO NOT move the iron around. Allow the garment to cool down. If you can still peel the label off with your fingernail, your iron is not hot enough.