I hand write mine with a black Pigma pen on cream muslin with freezer paper ironed on the back. Next, I decorate it with fabric pen colors in just a simple flower or geometric design. Then I buttonhole stitch it on with Perle cotton. My quilts have all been for family. Whoops, I didn't put labels on my donation quilts.
The printer ink is permanent. My son is not a careful laundry person and his girls' pictures on the back of his quilt have survived.